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6,00 6,42 Ss. Od. £. Required the cornmission on 964 dols. 90 ets. at * per cent.?

ns. S?). Tors: 3. "What may a factor demand on 13 per cent. eumniise Bun, for laying out 3568 dlars sins. $62, 4*ct*

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

EXAMPLES. 1. What is the brokerage of 7501. 83. 4d, at 6%. Bd. per cent. :

f. s. d. .750 8 Here I first find the brokerage at i

pound per cent. and then for the

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

s. d. £. s. d. grs.

6 8 = 101 10.08

Ans. 6% 100!}


1,00 2. "I hat is the brokerage upon 4125 dols. at 3 or 5 cents per cent..

Ans. $:50, 33ets. Am. 3. It a broker sells goods to the amount of 5000 dola what is his demand at 65 cts, per cent.

Rus 892, 30cm

4. What may a broker demand, when he sells gooils to the value of 5081. 17$. 10d. and I allow him 11 per cent P

. Ans. £7 12s. 8d.

INSURANCE, IS a premium at so much per cent. allowed to persons and offices, for makina rood the loss of ships, houses, mer, chandize, &c. which may happen from storms, fire, &c.

EXAMPLES. 1. What is the insurance of 725i. Ss. 10d. at 124 per cent. ?

Ans. £90 13s. 74d. 2. What is the insurance of an East-India ship and cargo, valued at 123+25 dollars, at 154 per cent. ?"

Ans. $19130, 87 cts. 5m. 3. A man's house estimated at 5500 dollars, was insų, red against fire, for 1x per cent. a year : what insurance did hu annually pay?

Ans. $61, 25cts.

For calculating Interest at 6 per cent. either for months,

or months and days.

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

2. If the principal consists 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 tien stands, it will shew the interest for one month, in shillings, and decimals of a shilling.

EXAMPLES. 1. Required the interest of 541. for seven months ani days at 6 per cent

10 days»})5,4 Interest for one month.

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

f. S. £
42 10 = 42,5 decimal value.
Therefore 4,25 shillings interest for 1 month.


Ans. 46,75 Interest for 11 mo.

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3. Required the interest of 941. 78. 6d. for one year, five months and a half, at 6 per cent. per annum.

Ans. £8 5s. 1d. 3,5grs. 4. What is the interest of 121. 188. for one third of a month, at 6 per cent. I

Ans. 5,160,


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 left of the separatris will be cents, and those on the right, decimals of a cent.

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

EXAMPLES. 1. What is the interest of 341 dels. 52 cts. fer 73 months ? 2)S41,52

. Or thus, 1:0,76 Int. for 1 nonth. 170,76 Int. for 1 month. 7.7,5 months is

85380 195,32 o. for 7 mo. 119532 85,38 viu. for ļ mo.

8 cts. m

1280,00cts. 12,80 7 1280,60 Ans. 1280.7 cts. =$12, 80cts. iun.

2. Required the interest of 10 dols. 44 cts. for 3 years 5 months and 10 days.


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Ans. 1881cts. -$18, 81cts. Notr..--To find the interest of any sum for 2 months, at 6 per cerit. prove beer orils call thic collars so many cerits, anlihe interior denominations decimals of a cent, and it is ilorie : Thus, the int.'!'est of 100 dollars for two monthos, is 100) cerits, or 1 dollar; and $25, 40 cts. is 25 cls. 4 m. &c. which gives the following

RULE II Multiply the principal by hall the number of months, me the product will shiew the interest for the given time,

7s and decimals of a cent, as above.

EXAMPLES. 1. Required the interest of 316 dollars for 1 year and 10 months.

11zhalf the number of mo.

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728, 50ets. Ans.=87, 28cts. 5m. III. When the principal is given in federal money, at 6 par cent. to find how much the monthly interest will be in New-England, &c. currency.

RULE. Multiply the given principal by ,,03 and the product will be the interest for one month, in shillings and deci. mal parts of a shilling!

EXAMPLES 1. What is the interest of 325 dols. for 11 months ?

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9,75 shil. int. for 1 month. x11 months.

Ans. 107,258.=557s. 3d. 2. What is the interest in New-England currency, of 31 dols. 68 cts, for 5 months ?

Principal 31,68 dole.

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