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THE NEW STUDENT'S REFERENCE WORK

2193

A.

$6440 = cost.

.22

B.

$6440 = cost 1.22

12880 12880

$1416.80 == gain $6440.

12880 12880 6440

$7856.80 = selling price.

$7856.80 = selling price. Method B is preferable.

Whenever a sale is made at profit, add the per cent gained to 100 per cent before multiplying. Whenever a sale is made at a loss, subtract the per cent lost from 100 per cent before multiplying.

16.   A coal dealer buys coal at $4.35 and sell it at a gain of 16%. What is his selling price!

17.   A carriage costing $230 was sold at a profit of 37%%. What was the selling price!

18.   A man whose salary is $3800 pays 11^% for board and 18|% for other expenses. How much does he save!

19.   What is |% of $828! What is If % of $828!

20.   A man buys 48 yd. silk at $1.25 per yard, 36 yd. muslin at 12%c per yard. He pays 72% of the bill. How much does he still owe!

II. To find what per cent one number is of another.

If a pupil is absent from school 12 days in a period of 75 days, what per cent of the time is he absent!

12 da. out of 75 da. will be ft of the time. What per cent of 45 is 15!

B.

= 331%

= -fa == .16 = 16%.

A.   44 =:

45)15.00 135 150 135 15

331%

Rule. To find what per cent one number is of another, we first express the relation as a common fraction in its lowest terms, then change the fractional part to hundredths.

What part of 60 is 20! $.

What per cent of 60 is 20! 331%.