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Percentages are fractions with 100 as denominator

EXAMPLE 1

Change the following fractions to percentages

  1. 2/5 2/5 of 100 = 2/×  100 = 200  = 40%

5

EXAMPLE 2

Change these percentage to fractions

  1. 75% = 75  = 15 = 3    

100     20    4

EXAMPLE 3

Change 7 ½% to fractions in their lowest terms

See also  TRIGNOMETRICAL RATIO

Solution

7 ½ % = 7 ½ out of 100

= 15/2 × 1/100

= (15 × 1) ÷ 200

= 15 ÷ 200 = 3/40

EXERCISE

Change the following fraction to percentage

  1. 2/5
  2. 2/4
  3. 3/30

Change to fractions in their lowest terms

  1. 66 ½ %
  2. 12 ¼ %
  3. 16 2/3 %

 

See also

RATIO AND PERCENTAGE

PROFIT AND LOSS

See also  SCALE DRAWING

PROBLEM ON MULTIPLICATION OF MONEY

Money

ESTIMATION

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