EXAMPLES. 1. How much shalloon that is yard wide, will line 5 yards of cloth which is 14 yard wide? Yds. yds. yds. Yds. As 13:5 And 7××5=35=16,1 Ans. 2. If a man perform a journey in 3 days, when the day is 124 hours long; in how many days will he do it when the day is but 9 hours. 3. If 13 men in 113days, mow 21 days will 8 men do the same. 4. How much in length that is 7 make a square foot ? 44 Ans. 4 days. acres, in how many Ans. 18 days. inches broad, will Ans. 20 inches. 5. If 254s. will pay for the carriage of an cwt. 1451 miles; how far may 64 cwt. be ney? 6. How many yards of baize will line 187 yards of camblet carried for the same moAns. 22 miles. which is 14 yards wide, yd. wide? Ans. 11yds. 1qr. 1} na. RULE OF THREE DIRECT IN DECIMALS. RULE. REDUCE your fractions to decimals, and state your question as in whole numbers; multiply the second and third together; divide by the first, and the quotient will be the answer, &c. EXAMPLES. 1. If of a yd. cost of a pound; what will 154 yds. come to ? Yds. As ,875,583 :: 1,8757,583+and 4TM,75 Yds. £. 2. If 1 pint of wine cost 1,2s. what cost 12,5 hhds. ? Ans. £.378 3. If 4 yds. cost 3s. 44d. what wil: 30 yds. cost Ans. £.1 4s 4d Bars 4. If 1,4 cwt. of sugar cost 10 dols. 9 cts. what will 9 ewt. 3 qrs. cost at the same rate? cwt. As 1,4 come to ? cwt. $ 10,09: : 9,75: 70,269=$70, 26cts. 9m.+ 5. If 19 yards cost 25,75 dols. what will 435 yards Ans. $590, 21cts. 7m. 6. If 345 yards of tape cost 5 dols. 17 cents, 5m. what will 1 yard cost? Ans. ,015=1cts. 7. If a man lays out 121 dols. 23 cts. in merchandize, and thereby gains 39,51 dols. how much will he gain in laying out 12 dollars at the same rate? Ans. 3,91 dols.=$3, 91cts. 8. How many yards of ribbon can I buy for 25 dols. if 29 yds. cost 44 dollars ? Ans. 178 yards. 9. If 178 yds. cost 25 dollars, what cost 29 yards ? Ans. 841 10. If 1,6 cwt. of sugar cost 12 dols. 12 cts. what cost 8 hhds. each 11 cwt. 3 qrs. 10,12 lb. ? Ans. 269,072 dols. $269, 7cts. 2m.+ SIMPLE INTEREST BY DECIMALS. A TABLE OF RATIOS. Ratio is the simple interest of 11. for one year; or in federal money, of $1 for one year, at the rate per cent. agreed on. RULE. Multiply the Principal, Ratio and time continually together, and the last product will be the interest required. EXAMPLES. 1. Required the interest of 211 dols. 45 cts. for 5 years, at 5 per cent. per annum ? 8 cts. 211,45 Principal. 10,5725 Interest for one year. 52,8625 Ans. 52, 86cts. 2‡m. 2. What is the interest of 645l. 10s. for 3 years, at 6 per cent. per annum ? £645,5X06x5=116,190-116 Ss. 9d. 2, 4grs. Ans. s. What is the interest of 121l. 88. 6d. for 4 years, at 6 per cent. per annum ? Ans. £32 15s. 8d. 1,56qrs. 4. What is the amount of 536 dollars 39 cents, for 11 years at 6 per cent. per annum ? Ans. $584,6651. 5. Required the amount of 648 dols. 50 cts. for 123 yrs. at 5 per cent. per annum ? Ans. $1103, 26cts.+ The amount, time and ratio given, to find the principal. RULE. Multiply the ratio by the time, add unity to the product for a divisor, by which sum divide the amount, and the quotient will be the principal. EXAMPLES. 1. What principal will amount to 1235,975 dollars, in 5 years, at 6 per cent. per annum? $ $ ,06×5+1=1,30)1235,975(950,75 Ans. 2. What principal will amount to 8731. 19s. in 9 years, at 6 per cent. per annum ? Ans. £567 10s. 3. What principal will amount to 626 dols. 6 cts. in 13 years, at 7 per cent. ? Ans. $340,25=$340, 25cts. 4. What principal will amount to 9561. 10s. 4,125d. in 8 years, at 5 per cent. ? Ans. £645 15s. CASE III. The amount, principal and time given, to find the ratio RULE.-Subtract the principal from the amount, di vide the remainder by the product of the time and principal, and the quotient will be the ratio. EXAMPLES. !. At what rate per cent. will 950,75 dols. amount 1235, 975 dols. in 5 years ? 285,2250 950,75×5=4753,75)285,2250(,06=6 per cent. Ans. 2. At what rate per cent. will 567l. 10s. amount to Ans. 6 per cent. 873l. 19s. in 9 years? $. At what rate per cent. will S40 dols. 25 cts. amount to 620 dols. 6 cts. in 12 years? 4. At what rate per cent. will 9567. 10s. 4,125d. in 83 years? CASE IV. The amount, principal, and rate per the time. Ans. 7 per cent. 645l. 15s. amount to Ans. 5 per cent. cent. given, to find Subtract the principal from the amount; divide the remainder by the product of the ratio and principa!; and the quotient will be the time. EXAMPLES. 1. In what time will 950 dols. 75 cts. amount to 1235 dollars, 97,5 cents, at 6 per cent. per annuin? From the amount $1235,975 Take the principal 950,75 950,75X0657,0450)285,2250(5 years, Ans. 285,2250 2. In what time will 5671. 10s. amount to 873l. 19s. at 6 per cent. per annum ? Ans. 9 years. S. In what time will 340 dols. 25 cts. amount to 626 dols. 6 cents at 7 per cent. per annum ? Ans. 12 years. 4. In what time will 645l. 15s. amount to 956l. 10s. 4,125d. at 51 per ct. per annum ? Ans.8,75=82 years. TO CALCULATE INTEREST FOR DAYS. Multiply the principal by the given number of dav and that product by the ratio; divide the last produc $65 (the number of days in a year) and it will give the terest required. EXAMPLES. 1. What is the interest of 360. 10s. for 146 days, at 6 per cent. ? 360,5×146x,06 365 £. s. d. grs. =8652-8 13 0 1,9 Ans. Ans. $10,53cts.+ Ans. £4,1235-4l. 2s. 5jd.+ 2. What is the interest of 640 dols. 60 cts. for 100 days 3. Required the interest of 250l. 17s. for 120 days at 4. Required the interest of 481 dollars 75 cents, for 25 days, at 7 per cent. per annum ? Ans. $2, 30cts. 9m.+ at 6 per cent. per annum ? 5 per cent. per annum ? A TABLE, showing the number of Days from any day of one months to the same day of any other month. FROM ANY DAY OF Jan. Feb. Mar Ap'l. May June July Aug. Sept. Oct. Nov Dec. 365 334 306 275 245 214 184 153 122 92 61 31 Mar 59 Apl. 90 May 120 89 61 June 151 120 92 92 61 July 181 150 122 91 61 61 31 365 335 91 61 30 365 Jan. 31 365 334 304 273 243 91 62 31 365 335 304 274) |