8. 10,000 barrels, 121%.

9. 1200 men,

10. 320 horses,

18. 8250 apples, 88%.

11%. 19. 4440 dollars, 100%.

61%. 20. 1898 years, 33%.

4. A grocer paid $356 for sugar and sold it at a gain of 15%. What was his gain?

5. I bought 46 cords of wood, at $3.50 per cord, and sold it at a gain of 25%. What was my whole gain?

6. What will 50 sheep cost if 75 are worth $375, and for how much must they be sold to gain 121% ?

7. I sold 500 bushels of corn for $200. The corn cost me 25% more. How much did I lose on each bushel?

8. A man bought 2165 bushels of wheat for $1515.50. A part receiving damage, he is willing to lose 10%. Find the selling price.

9. A miller charges 5% for grinding. How many quarts will he take when he has ground 35 bushels?

10. Ninety per cent. of a class of 60 pupils are promoted. How many are not promoted?

11. A girl spelled correctly 99% of 200 words. How many did she miss?

12. A lot is sold for $1050, of which is 20% is profit. What did the lot cost?

13. How much did I gain on a house for which I paid $9870, my profit being 3%.

14. A piano, marked $750, was sold for cash at 35% less. What was the selling price?

15. A man invested 121% of $15,320 in stocks. How much did he invest?

INTEREST.

1. Interest is money paid for the use of money. It is computed at a rate per cent. of the money used.

2. The money used is called the Principal (Base).

=

3. The Principal × Rate One year's interest (Percentage).

4. Interest for a greater or less time than one year = Principal Rate X Years, or fraction of a year.

What is 6% of $500? Of $1000?

What is the interest of $500 for 1 yr., at 6%? For 2 yrs.? For 5 yrs.? For 10 yrs. ? For 25 yrs.?

What is the interest of $1000 at 6% for yr.? yr? yr.? 9 mo.? 10 mo. ?

Percentage, or one year's interest, multiplied by time, expressed in years, gives you what?

What are the three factors of interest?

PRINCIPLE.

The factors of interest are principal, rate, and

time (years).

1. Find the interest of $1200 for 2 yrs., at 5%.

2. What is the interest of:
1. $250 for 1 yr. at 6% ?

2. $300 for 1 yr. at 5% ?
3. $500 for 1 yr. at 4% ?
4. $600 for 1 yr. at 3% ?
5. $1000 for 1 yr. at 7% ?
6. $275 for 2 yrs. at 8% ?
7. $236 for 3 yrs. at 5% ?
8. $1673 for 4 yrs. at 6% ?
9. 430.87 for 5 yrs. at 7%?
10. $2846 for 6 yrs. at 8% ?
11. $12.46 for 11 yrs. at 9% ?
12. $126.37 for 1 yr. at 7% ?
13. $876 for 1 yr. at 8% ?
14. $327 for 3 yr. at 6% ?
15. $56.79 for 5 yrs. at 4% ?
16. $182.34 for 23 yrs. at 6% ?
17. $182.34 for 2 yrs. 6 mo. at 6% ?
18. $432.81 for 1 yr. 9 mo. at 5% ?
19. $3843 for 3 yrs. 3 mo. at 7% ?
20. $129.95 for 1 yr. 8 mo. at 10% ?

3. Find the interest of $530.60 for 6 yr. 8 mo. at 6%.

2. Multiplying the principal by Too, the rate, we get the interest for 1 year. By dividing the interThen multiplying the

est for 1 year by 12, we get the interest for 1 mo.

interest for 1 mo. by 80, the number of months, we get the interest required. The process is shortened by cancellation.

1. $523.30 for 3 yrs. 9 mo. at 5%.
2. $429.47 for 4 yrs. 7 mos. at 7%.
3. $536.35 for 5 yrs. 6 mos. at 6%.
4. $796.70 for 4 yrs. 8 mos. at 8%.
5. $548.29 for 6 yrs. 3 mos. at 9%.
6. $415.38 for 5 yrs. 5 mos. at 4%.
7. $847.27 for 3 yrs. 10 mos. at 7%.
8. $1046.60 for 2 yrs. 3 mos. at 6%.
9. $858.94 for 3 yrs. 5 mos. at 6%.
10. $1072.70 for 1 yr. 11 mos. at 6%.

4. Find the interest of $635.48 for 3 yr. 6 mo. 18 da.

2. The principal multiplied by the rate,, gives the interest for 1 yr.; the interest for 1 yr., divided by 12, gives the interest for 1 mo.; the interest for 1 mo. multiplied by the number of months gives the interest for full time. By cancellation we find $90.24 to be the required

interest.

5. Find the interest of $480 for 2 yr. 11 mo. 10 da.

2. Finding the interest for one year, as before, we then divide the interest for one year The interest for 1 da. multi

by 360, and thus get the interest for 1 day.
plied by the number of days gives the interest for full time.
The Principal + the Int. the Amount. $480+ $70.67
6. Find the interest and the amount of:

=

1. $470.35 for 3 yr. 8 mo. 18 da. at 6%. 2. $516.50 for 4 yr. 6 mo. 15 da. at 7%. 3. $318.47 for 3 yr. 7 mo. 10 da. at 5%. 4. $534.46 for 4 yr. 9 mo. 27 da. at 7%. 5. $830.27 for 4 yr. 8 mo. 17 da. at 6%. 6. $579.47 for 4 yr. 10 mo. 12 da. at 5%. 7. $320.58 for 3 yr. 6 mo. 13 da. at 7%. 8. $436.45 for 2 yr. 2 mo. 24 da. at 8%. 9. $547.44 for 5 yr. 3 mo. 19 da. at 4%. 10. $308.56 for 6 yr. 4 mo. 9 da. at 34%.

1. Add:

GENERAL REVIEW.

1. $295,746.97 2. $374,116.96

$550.67.

3. $6,604.00