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CASE V. When Tare, Trett, and Cloff are allowed : nedict the tare and trett as before, and divillies the suttle by 168 (because 2 lb. is the idol of 3 cwt.) the quo, tient will be the cloil, which subtract from thic suttle, and the remainder will be the neat weight.

EXAMPLES

1. In S hogsheads of Tobacco, each weighing 13 cwt. 3 qrs. 23 Ib. gross, tare 107 lb. per hogshead, trett 4 lb. per 104 lb. and cluit 2 lb. per cwt, as usual; how much neat.

cict. qrs. lb
135 00
4

55

28

443 112

1563 lb.gross of 1 lihd.

S

4689 whole gross. 107 XS $21 tare.

26)4368 suttle.

168 trett,

168)4200 suttle

25 cloft.

Ans. 4175 neat weight. 2. What is the neat weight of 26 cwt. S grs. 20 lb.

gross tare 52 lh. the allowance of trett and cloft as usual : Ans, neat 23cut. Igr. 516. 1oz. nearly; omitting

further fractions.

INTEREST.

INTEREST is of two kinds ; Simple and Compound.

SIMPLE INTEREST.
Simple Interest is the sum paid by the borrower to the
lender for the use of money lent; and is generally, at a
certain rate per cent. per annum, which in several of the
United States is fixed by law at 6 per cent. per annum ;
that is, 61, for the use of 1001. or 6 dollars for the use of
100 dollars for one year, &c.

Principal, is the sum lent.
Rate, is the sum per cent. agreed on,
Amount, is the principal and interest added together.

CASE I.
To find the interest of any given sum for one year.

RULE,
Multiply the principal by the rate per cent and divide
the product by 100; the quotient will be the answer.

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EXAMPLES.

1. What is the interest of 391. 11s. 8 d. for one year at 6l. per cent. per annum ?

£

d. 39 11 81

6

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237 10 3
20

7150

12

6/03

4

0/12 2. What is the interest of 261. 10s. 4d. for a year,

Ans. £2 7s. 6d. Ter

at 5 per cent.

Ans, £11 168. 6d.

3. What is the interest of 5711. 13s. 9d. for one year, at 6l.

Ans. £ 34 6s. Od. 4. What is the interest of 21. 12s. 93d. for a year, at 6lo per cent. ?

Ans. £0 Ss. 2d.

per cent. I

$

FEDERAL MONEY. 5. What is the interest of 468 dols. 45 cts. for one year at 6 per cent. ?

$ cts. 468, 45

6

2810, 70=828, 10cts. 7m. Ans. Here I cut off the two right hand integers, which divide 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 cent, 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

6. Required the interest of 135 dols. 25 cts. for a year at 6 per cent.

$ cts. 135, 25

6

EXAMPLES.

811, 59=98, 11cts. 5m. Ans. to me. What is the interest of 19 dollars 51 cents for one year at 5 per cent. : $ cts

19, 51

5

97, 55=97cte. 54m. Ans. 8. What is the interest of 436 dollars for one year, at 6 per cent?

6

Ans. 2616cts. $26, 18cts.

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:

9. What is the interest of $73, 65 cents for a year, at 6 per cent.

Principal 7365 cents.

3

Ans. 441,90cts.=441sets. or 84,41cts. 9. 10. Required the interest of $85, 45cts. for a year, at 7 per cent. ?

Cents.
Principal 8545

7

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Ans. 598, 15 cents,=$5,98cts. 14m.

CASE II. To find the simple interest of any sum of money, for any Dumber of

years,

and parts of a year. GENERAL RULE.

Ist. Find the interest of the given gum for one year.

2d. Multiply the interest of one year by the given pumber of years, and the product will be the answer for that time.

Sd. If there be parts of a year, ás 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 gum sufficiently exact for common use; but if the sum be very farge, you may say,

Ăs 365 days : is to the interest of one year : : so is the given number of days : to the interest reruired.

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EXAMPLES. 1. What is the interest of 75l. 8s. 4d. for 5 years and 2 months, at 6l. per cent, per annum ?

£. s. d.
75 8 4
6 | 2m0,3)4 10 6 Interest for 1 year.

5 452 10 0

22 12 6 do, for 5

years.

0 15 1 do. for 2 months. 1050 12

£2377 Ans.

20

6100

2. What is the interest of 64 dollars 58 centa, for 3 years, 5 months, and ten days at 5 per cent. ?

$ 64,58

5

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

[Case I.

4 mo. 1 mo. 10 days,

968,70 do. for 3 years.

107,65 do. for 4 months. 26,90 do. for 1 month.

8,96 do. for 10 days.

per cent. I

Ins. 1112,191112cts, or $11, 12c. 176. 3. What is the interest of 789 dollars for 2 years, at 6

Ans. 894, 68cts. 4. Of 37 dollars 50 cents, for 4 years, at 6 per cerrt. per annuin ?

Ans. 900cts, or 89. 5. Of $25 dollars 41 cts. for 3 years and 4 months, at 5 per cent.

Åns. $54, 23cts. 5m. 6. Of 325l. 128. 3d. for 5 years at 6 per cent. ?

Ans. 697 13s. 8d. 7. Of 1741. 10s. 6d. for 3 and a half years at 6 per cent. ?

Ans. 436 13s. 8. Of 1501. 169. 8d. for 4 years and 7 months, at 6 per cent. :

Ans. £41 9s. d.

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