EXAMPLES. 1. What is the interest of 751. 8s. 4d. for 5 years and 2 months, at 61. s. d. 62mo.4 10 6 Interest for 1 year. 75 8 4 2. What is the interest of 64 dollars 58 cents, for 3 years, 5 months, and ten days at 5 per cent. ♪ 4 mo. 1 mo. 10 days, $64,58 $22,90 Interest for 1 year in cents, per 3 968,70 do. for 3 years. [Case I. Ans. 1112,19-1112cts. or $11, 12c. 1m. 3. What is the interest of 789 dollars for 2 years, at 6 per cent.? Ans. 894, 68cts. 4. Of 37 dollars 50 cents, for 4 years, at 6 per annum ? 5 per cent. Ans. 900cts. or $9. 5. Of 325 dollars 41 cts. for 3 years and 4 months, at per cent. ? Ans. $54, 23cts. 5m. 6. Of 325l. 12s. 3d. for 5 years at 6 per cent.? Ans. £97 13s. Ed. 7. Of 174l. 10s. 6d. for 3 and a half years at 6 per cent. ? 8. Of 150l. 16s. 8d. for 4 years per cent. ? Ans. £36 13s. and 7 months, at 6 Ans. £41 9s. 7d. 9. Of 1 dollar for 12 years at 5 per cent. and a half per cent. ? Ans. 60cts 10. Of 215 dollars 34 cts. for 4 and a half years, at Ans. $33, 91cts. 6m. 11. What is the amount of 324 dollars, 61 cents, fors years and 5 months, at 6 per cent. P 12. What will 30007. Ans. 8430, amount to in months, at 6 per cent. P 10ets. 8-25m. year and 13. What is the inter est of 257l. 5s. 1d. for 1 3 quarters, at 4 per cent. ? Ans. £18 Os. 1d. Sqrs. 14. What is the interest of 279 dollars, 87 cents for £ years and a half, at 7 per cent. per annum.? Ans. $48, 97cts. 7m. 15. What will 2791. 138. 8d. amount to in 3 years and a half at 51 per cent. per annum ? Ans. £331 1s. 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 cts. 17. What will 730 dols. amount to at 6 per cent. in $ years, 7 months and 12 days, or of a year ? Ans. $975, 99cts. 18. What is the interest of 18251. at 5 per cent. per annum, from March 4th, 1796, to March 29th, 1799, (allewing the year to contain $65 days 7) Ans. £280. NOTE. The Rules for Simple Interest serve also to calculate Commission, Brokerage, Insurance, 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 8431 10%. come to at per cent. £. s. 843 10 5 42 17 10 20 $ 50 600 £42 3s. 6d. 2. Required the commission on 964 dols. 90 cts. at 24 per cent.? Ans. 821, 71cts. S. What may a factor demand on 1 per cent. commission, for laying out 3568 dollars? BROKERAGE, Ans, 862, 44cts IS an allowance of so much per cent. to persons assisting merchants, or factors, in purchasing or selling goods. EXAMPLES. 1. What is the brokerage of 750l. 83. 4d. at 6s. &d. per cent. ? S. d. 50 8 4 7,50 8 4 10,08 12 1,00 2. What is the brokerage upon 4125 dols. ator 75 cents per cent. ? Ans. $30, 93cts, 74m. 3. If a broker sells goods to the amount of 5000 dols, what is his demand at 65 cts. per cent. ? Ans $32, 50cés, 4. What may a broker demand, when he sells goods to the value of 5081. 17s. 10d. and I allow him 1 per cert ? Ans. £7 12s. 8d. INSURANCE, IS a premium at so much per cent. allowed to persons and offices, for making good the loss of ships, houses, merhandize, &c. which may happen from storms, fire, &c. EXAMPLES. 1. What is the insurance of 7251. 8s. 10d. at 121 pèr cent.? Ans. £90 13s. 7id. 2. What is the insurance of an East-India ship and cargo, valued at 123425 dollars, at 15 per cent. ? Ans. $19130, 87cts. 5m. 3. A man's house estimated at 3500 dollars, was insir red against fire, for 13 per cent. a year: what insurance did he annually pay? Ans. $61, 25cts. SHORT PRACTICAL RULES, For calculating Interest at 6 per cent. either for months, or months and days. I. FOR STERLING MONEY. RULE. 1. If the principal consists of pounds only, cut off the nit 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 then 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 27 £ ten days, at 6 per cent 9. 10 days=1)5,4 Interest for one month. 37,8 ditto for 7 months. Ans. 39,6 shillings-£1 19s. 7,2d. 12 7,2 2. What is the interest of 42, 10s. for 11 months, at 6 per cent. ? 1 £.. s. f. 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. 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 12. 18s. for one third of a month, at 6 per cent. Ans. 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 left 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 number of months, or months, and decimal parts thereof, or for the days take the even parts of a month, &c. |