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2. Ben Gunn of Treasure Island bought of Stevenson Creamery, 44 Ocean Ave., H. I.,

Apr. 1 2 lb. Roquefort cheese at $ 1.25

21 lb. Swiss cheese at .46
3 lb. Tillamook cheese at .30
4 lb. Wisconsin cheese at .34

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66

Paid Apr. 1 on account $3.30.

3. E. H. Skinner bought of David Eklund & Co., Baltimore, Md.,

Oct. 3 1 rocking chair at $ 7.65

14 2 wall mirrors at 12.50
19 2 Morris chairs at 62.50

66

Paid $ 20 on Oct. 5 ; $ 10 on Oct. 15 ; $ 20 on Oct. 19 ; $ 25 on Oct. 25.

66

4. Wesley Iberg bought of the Polaris Electric Co., St. Paul, Minn.,

Sept. 191 set of lead plates at $6.00

Recharging of battery .75

4 days' rent of battery at $.25 per day Paid in full Sept. 19.

5. Fred Frover purchased of the Homer Brown Supply Co., 4272 State St., Akron, Ohio,

Dec. 24 1 safety razor $ 5.00

1 box talcum powder .25
1 hand mirror

1.75
12 oz. of witch hazel .25

66

Paid on account Dec. 24, $ 5.

CHAPTER V

PERCENTAGE

Per cent means by the hundred. Hence, 5 per cent of a number means at the rate of 5 out of a hundred ; 25 per cent means 25 out of a hundred, and so on.

Per cent is usually indicated by the symbol %. Thus, 8% means 8 per cent, or 8 out of a hundred, or 8 hundredths. It can be written also 167 or 08. Seven and one half per cent can be written 71 % or .075. Thus, per cent can be expressed either as a decimal fraction or as a common fraction.

Rule. — To express per cent as a common fraction, (1) write the number indicating the per cent for the numerator and 100 for the denominator, and (2) reduce this fraction to lowest terms.

EXAMPLE Express 5% both as a decimal and as a common fraction in its lowest terms.

5% = .05 = 16 =

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100

ORAL DRILL Express as decimals and as common fractions in their lowest terms the following per cents :

1. 10% 5. 75 % 9. 200% 13. 121 % 17. 871% 2. 20% 6. 100 % 10. 275 % 14. 81% 18. % 3. 25 % 7. 120 % 11. 33} % 15. 163 % 19. 10% 4. 50 % 8. 150 % 12. 663 % 16.621 % 20. 1 % %

:

Exercise Write the following decimals as fractions and as per cents : 1. .05 5. .75

9. .163
13. 3.00

17. .063
2. .10
6. .33}
10. .375 14. 9.00

18. .03} 3..20 7. .66%

11. 1.50 15. 1.10 19. .005 4. .50 8..121 12. 2.75 16. .081

20. .001

Exercise Write the following fractions as decimals and as per cents : 1.4 5.

9.
13. ਚ

17.
2.
} 6.

10. }

14. 24 3. 7.

15. 25

19. 1 4. } 8. j

12. 12
16. 16

20.30

8

18. }

11. ģ

=

The following is a tabulated list of the percentage equivalents of commonly occurring fractions : ido=1% its = 63 % 1 = 144 % 1 = 50 % 36 = 2% 50

12=81% = 163 % Ž= 621% 30=31 % i=911 % *= 20% = 663 % 25=4% i=10% 1= 25 % = 75 % 20 = 5% f=113% = 33 % a = 83% lo = 64 % =121% = 371 % f= 871 %

=

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ORAL DRILL

1. What is 50% of 100? of 80 ? of 60 ? of 360? of 500 ? of 1000?

2. What is 25 % of 100? of 80? of 60 ? of 360? of 500 ? of 1000?

3. What is 10 % of 100? of 80? of 60 ? of 360 ? of 500? of 1000 ?

4. What is 20 % of 100? of 80? of 60 ? of 360 ? of 500 ? of 1000?

5. What is 5% of 100? of 80? of 60 ? of 360 ? of 500? of 1000 ?

Base, Rate, Percentage The base is the number on which the percentage is computed.

The rate is the number of hundredths and is usually expressed as a decimal.

The percentage is the result obtained by taking a certain per cent of the base.

Rule. – To find the percentage when the base and rate are given, express the rate as a decimal and multiply the base by it.

EXAMPLE 1. Find 6 % of $ 50. $ 50 the Base, is the number on which the percentage is computed.

.06 the Rate, is the number of hundredths taken. $3.00 the Percentage, is the result of multiplying base by rate.

EXAMPLE 2. Find 52 % of EXAMPLE 3. Find 311 % of $ 420.

$ 150. $ 420 Base

.315 Rate .52 Rate

$150 Base 8 40

157 50 210 0

315 $ 218.40 Percentage

$ 472.50 Percentage

ORAL DRILL

1. Find 3% of 100 2. Find 4% of 200 3. Find 6 % of 1000 4. Find 10 % of 500 5. Find 12% of 600 6. Find 14 % of 20

7. Find 18 % of 20

Find 22% of 30 9. Find 26% of 300 10. Find 54 % of 200 11. Find 41 % of 20 12. Find 61% of 30

13. Find 82 % of 40
14. Find 95 % of 1000
15. Find 9% of 200
16. Find 19 % of 200
17. Find 29% of 200
18. Find 8% of 60
19. Find 18% of 30
20. Find 28 % of 20
21. Find 52 % of 40

22. Find 62 % of 50
23. Find 74% of 50
24. Find 81 % of 600
25. Find 65 % of 20
26. Find 46% of 200
27. Find 57 % of 40
28. Find 82% of 30
29. Find 85 % of 40
30. Find 96 % of 200

Exercise

1. What is 61 % of 100? of 96 ? of 360 ? of 500 ? of 600 ? of 1?

2. What is 63 % of 100? of 96? of 360? of 500? of 600? of 1?

3. What is 3} % of 100? of 96 ? of 360? of 500 ? of 600? of 1?

4. What is 144 % of 100? of 96 ? of 360 ? of 500? of 600 ? of 1?

5. What is 83} % of 100? of 96 ? of 360 ? of 500? of 600 ? of 1?

6. What is 87}% of 100? of 96? of 360 ? of 500? of 600? of 1?

7. What is 371 % of 100? of 96? of 360 ? of 500? of 600 ? of 1?

8. What is 621 % of 100? of 96 ? of 360 ? of 500 ? of 600 ? of 1 ?

9. What is 66 % of 100? of 96 ? of 360? of 500 ? of 600 ? of 1?

10. What is 871 % of 100? of 96 ? of 360 ? of 500? of 600 ? of 1?

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