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Ans. 1119101112cts. or $ 11, 12c. 11m.

EXAMPLES. 1. What is the interest of 751. 8s. 4d. for 5 years and 2 months, at 6l. per cent. per annum ?

£. d.
75 8 4

£. d.
6
2mo.=:)4

10

6 Interest for 1 year.

5 452 10 0 20

22 12

6 do. for 5 years.

0 15 1 do. for two montns. 1050 12

£23

7 7 Ans. 6100

2. What is the interest of 64 dollars 58 cents for $ years, 5 months, and 10 days at 5 per cent. ?

$ 64,58

5 322,90 Interest for 1 year in cents, per 3

[Case 1. 968,70 do. for 3 years. 4 mo.

107,63 do. for 4 months. 1 mo.

26,90 do. for 1 month. 10 days, 8,96 do. for 10 days.

3

per cent. ?

3 What is the interest of 789. dollars for 2 years, at 6

Ans. $ 94, 68cts 4. Of 37 dollars 50 cents, for 4 years, at 6 per cent. per annum ?

Ans. 900cts. or $9. 5. Of 325 dollars 41 cts. for 3 years and 4 months, at 5 per cent. ?

Ins. $54, 23cts. 5m. 6. Of 3251. 12s. 3d. for five years at 6 per cent. ?

Ans. £97 135. 8d. 7. Of 1741. 10s. 6d. for 3 and a half years at 6 per cent. ?

Ans. £36 13s. 8. Of 1501. 16s. 8d. for 4 years and 7 months, at 6 per cent. ?

Ans. £41 9.s. 7d

m.

9. Or 1 dollar for 12 years at 5 per cent. ?

Ans: 6Octs. 10. Of 215 dollars 34 cts. for 4 and a half years, at 3 and a half per cent. ?

Ans. $33, 91cts. Om. 11. What is the amount of 324 dollars, 61 cents, for 3 years and 5 months, at 6 per cent. ?

Ans. $430, 10cts. 8,00 12. What will 3000l. amount to in 12 years and 10 months at 6 per cent. ?

Ins. £5310. 13. What is the interest of 2571. 5s. ld. for ] year

and 3 quarters, at 4 per cent. ? Ins. £18 Os. ld. 3qrs.

14. What is the interest of 279 dollars, 87 cents for 2 years and a half, at 7 per cent. per annum :

Ins. $48,97cts. 71 m. 15. What will 2791. 13s. 8d. amount to in 3 years and a half at 5. per cent. per annum?

Ans. 331 ls. 6d. 16. What is the amount of 341 dols. 60 cts. for 5 years and 3 quarters, at 7 and a half

per cent. per annum

?

Ans. $488, 91.1 cts. 17. What will 730 dols. amount to at 6 per cent. in 5 years, 7 months and 12 days, or 36 of

of a year?

Ans. $975, 99cts. 18. What is the interest of 18251. at 5 per cent. pei annum, from March 4th, 1796, to March 29th, 1799, (allowing the year to contain 303 days ?) Ans. £280.

Note.--The Rules for Simple Interest serve also to calculate Commission, Brokerage, Ensurance, or any thing else estimated at a rate per cent.

COMMISSION, IS an allowance of so much per cent., to a factor or correspondent abroad, for buying and selling goods for his employer

EXAMPLES.

1. What will the commission of 3431. 10s. come to at 5 per cent.

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600 £42 38. 6d. 2. Required the commission on 964 dols. 90cts. at 21 per cent. ?

Ans. $21, 71cts. 3. What may a factor demand on 13 per cent. commission for laying out 3568 dollars ? Ans. $62, 44cts.

BROKERAGE, IS en allowance of so much per cent. to persons assisting merchants, or factors, in purchasing or selling goods.

EXAMPLES.

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1 What is the brokerage of 750!. 8s. 4d. at 6s. 8d. per cent. ? of.

d. 750 .8 4

Here I first find the brokerage at 1 1

pound per cent, and then for the

given rate which is } of a pound.
7,50 8 4
20

j 8= 7 10 1 0
10,08
12

Ans. £2 10 0 1

3. d.

£. s. d. grs.

1,00 2. What is the brokerage upon 4125 dols. at or 75 Ct nts per cent. ?

Ans. $30, 93cts. 71m. 3. If a broker sell

goods to the amount of 5000 dole. What is his demand at 65 cts. per cent. ?

Ans. $32, 50cts,

4. What may a broker demand, when he sells goods to the value of 5081. 17s. 10d. and I allow him 1., per cent. ?

Ans. £7 12s. 8d.

***

ENSURANCE, IS a premium at so much per cent. allowed to persons and offices, for making good the loss of ships, houses, merchandis', &c. which may happen from storms, fire, &c.

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EXAMPLES. 1. What is the e Isurance of 7231. 8s. 1 d. at 12 per cent.?

Ins. 290 13s. 7 d. 2. What is the e urance of an East India ship and cargo, valued at 123425 dollars, at 15 per cent. ?

.Ins. $1913), 87ets. 5m. 3. A man's house estimated at 3500 dollars, was ed againsi fire, for 13 per cent. a year : what ensurance did he annually pay?

Ans. $61, 25cts.
-***«.
SHORT PRACTICAL RULES,
For calculating Interest at 6 per cent, either for months,

or months and days.
1. FOR STERLING MONEY.

RULE. 1. If the principal consist of pounds only, cut off the unit ligure, and as it then stands it will be the interest for one month, in shillings and decinal parts.

2. If the principal consist of pounds, shillings, &c. reduce it to its decimal value; then remove the decimal point one place or figure, further towards the left hand, and as the decimal then stands, it will show the interest for one month in shillings and decimals of a shilling.

EXAMPLES.

1. Required the interest of 341. for seran months and ten days, at 6 per cent.

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10 days=})5,4 Interesı for one month.

7

37,8 ditto for 7 months.

1,8 ditto for 10 days.

Ans. 39,6 shillings=£1 198. 7,2d.

12

7,2

2. What is the interest of 421. 10s. for 11 months, at 6

per cent. ?

£. S.

£.
42 10 =

42,5 decimal value.
Therefore 4,25 shillings interest for 1 month.

11

£. s.

d.

Ans. 46,75 Interest for 11 mo.

= 2 6 9

3. Required the interest of 941. 7s. 6d. for one year, five mon hs and a half, at 6 per cent. per annum ?

Ans. £8 5s. Id. 3,5qrs. 4. What is the interest of 121. 18s. for one third of a muntii, ai 6 per ent. ?

Ins. 5,16d.

II. FOR FEDERAL MONEY.

RULE. 1. Divide the principal by 2, placing the separatrix as usual, and the quotient will be the interest for one month in cents, and decimals of a cent; that is, the figures at the lett of the separatrix will be cents, and those on the right, decimals of a cent.

2. Multiply the interest of one month by the given num ber of months, or months and decimal parts thereof, or for the days take the even parts of a month, &c.

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