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3. What is the interest of 5717. 13s. 9d. for one year, Ans. £34 6s. 0žd.

at 6l. per cent.?

4. What is the interest of 21. 12s. 94d. for a year, at

61. per cent.?

Ans. £O Ss. 2d.

FEDERAL MONEY.

5. What is the interest of 468 dols. 45 cts. for one year'

at 6 per cent.?

Scts. 468, 45

6

28|10, 70-828, 10cts. 7m. Ans.

Here I cut off the two right hand integers, which di vide by 100 but to divide federal money by 100, you need only call the dollars so many cents, and the inferior denominations decimals of a vent, and it is done.

Therefore you may multiply the principal by the rate, and place the separatrix in the product, as in multiplication of federal money, and all the figures at the left of the separatrix, will be the interest in cents, and the first figure on the right will be mills, and the others decimals of a mill, as in the following

EXAMPLES.

6. Required the interest of 135 dois. 25 cts. for a year 8 cts.

at 6

per

cent.

*35, 25

6

811, 50-$8, 11cts. 5m. Ans.

7. What is the interest of 19 dollars 51 cents for one year at 5 per cent.?

Scts 19, 51 5

97, 55-97cts. 5m. Ans.

8. What is the interest of 436 dollars for one year, at

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Ans 2616cts.=$26, 16cts.

ANOTHER METHOD.

Write down the given principal in cents, which multiply by the rate, and divide by 100 as before, and you will have the interest for a year, in cents, and decimals of a cent, as follows:

6

9. What is the interest of $73, 65 cents for a year, at per cent. ?

Principal 7365 cents.

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Ans. 441,90cts.=441cts. or $4, 41cts. 9m. 10. Required the interest of $85, 45cts. for a year, at 7 per cent. ?

Cents.

Principal 8545

7

Ans. 598, 15 cents, $5,98cis. 14m.

CASE II.

To find the simple interest of any sum of money, for any number of years, and parts of a year.

GENERAL RULE.

1st. Find the interest of the given sum for one year. 2d. Multiply the interest of one year by the given number of years, and the product will be the answer for that time.

3d. If there be parts of a year, as months and days, work for the months by the aliquot parts of a year, and for the days by the Rule of Three Direct, or by allowing 30 days to the month, and taking aliquot parts of the

same.*

* By allowing the month to be 30 days, and taking aliquot parts thereof, you will have the interest of any ordinary sum sufficiently exact for common use; but if the sum be very large, you may say,

As 365 days is to the interest of one year given number of days : to the interest required.

so is the

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£42 3s. 6d.

2. Required the commission on 964 dols. 90 cts. at 21 per cent. ?

Ans. $21, 71cts. S. What may a factor demand on 1 per cent. commission, for laying out 3568 dollars?

茶糖

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. 8s. 4d. at 6s. 8d. er cent. ?

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2. What is the brokerage upon 4125 dols. ator 75 cents per cent. ? Ans. $30, 93cts. 74m. S. If a broker sells goods to the amount of 5000 dols. what is his demand at 65 cts. per cent. ?

Ans $32, 50c

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

Ans. 60cls. years, at $

10. Of 215 dollars 34 cts. for 4 and a half

and a half per cent. ?

Ans. 835, 9icts. 6m.

11. What is the amount of 324 dollars, 61 cents, for 5 years and 5 months, at 6 per cent. ?

12. What will 3000l.

Ans. 8430, amount to in

10cts. 8,25m.
12 years and 10
Ans. £5310.

months, at 6 per cent.

13. What is the inter est of 2571. 5s. 1d. for 1 year and

3 quarters, at 4 per cent. ?

Ans. £18 Os. 1d. 3grs. 14. What is the interest of 279 dollars, 87 cents for 2 years and a half, at 7 per cent. per annum?

Ans. $48, 97cts. 74m. 15. What will 279. 138. 8d. amount to in 3 years and a half at 54 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 dels. amount to at 6 per cent. in 5 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 from March 4th, 1796, to March 29th, 1799, (allowing the year to contain 365 days F) 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.

annum,

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 843 10s. come to at 5 per cent. ?

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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. 8s. 4d. at 6s. 8d. er cent. ?

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s. d. 750 8 4

1

7,50 8 4

20

10,08

12

1,00

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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, 50c

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