Class 5 Maths

Percentage, How to find Percentage, Class 5 Mathematics

Percentage

The phrase per cent is formed of two words – per and cent. Per means out of and Cent means hundred. Thus, per cent means out of hundred. For example, 8 per cent means 8 out of hundred. The symbol for per cent is ‘%’. 15% means 15 out of 100 and is equivalent to

    \[ \frac{15}{100} \]

Difference between Percentage and Percent:

The word percentage and percent are closely related to each other. Percent ( or symbol %) is accompanied with a specific number such as 55%. Percentage is represented without a number, is used generally for general case of percent.

How to convert Per Cent into an Equivalent Fraction

Example 1:
Convert 50% into an equivalent fraction.

50% = \cfrac{50}{100} = \cfrac{1}{2}

Example 2:
Convert 75% into an equivalent fraction.

75% = \cfrac{75}{100} = \cfrac{3}{4}

Example 3:
Convert 5 \cfrac{5}{2} % into an equivalent fraction.

5 \cfrac{5}{2} % = \cfrac{\cfrac{15}{2}}{100} = \cfrac{3}{40}

How to convert a Fraction into an Equivalent Per Cent

To convert a fraction into an equivalent per cent, multiply both the numerator and the denominator by such number so that the denominator becomes 100 OR multiply the given fraction by 100 and put the symbol % after the product. See the examples given below for better understanding.

Example 1:

Convert \cfrac{2}{5} into an equivalent per cent.

\cfrac{2}{5} = \cfrac{2 \text{ x } 20}{5 \text{ x } 20} = \cfrac{40}{100} = 40%

OR

\cfrac{2}{5} = \cfrac{\cfrac{2}{5} \text{ x 100} }{100} = \left(\cfrac{2}{5} \text{ x 100}\right) % = 40%

Example 2:
Convert 5 \cfrac{5}{4} into an equivalent fraction.

5 \cfrac{5}{4} = \cfrac{25}{4} = \cfrac{25 \text{ x 25}}{4 \text{ x 25}} = \cfrac{625}{100} = 625%

OR

5 \cfrac{5}{4} = \cfrac{\cfrac{25}{4} \text{ x 100}}{100} = \left( \cfrac{25}{4} \text{ x 100} \right) % = 625%

How to convert Decimal into Per Cent

To convert a decimal into an equivalent per cent, multiply both the numerator and the denominator by such number so that the denominator becomes 100 OR multiply the given fraction by 100 and put the symbol % after the product. See the examples given below for better understanding.

Example 1:
Convert 0.5 into its equivalent per cent.

0.5 = \cfrac{5}{10} = \cfrac{5 \text{ x 10}}{10 \text{ x 10}} = \cfrac{50}{100} = 50%

OR

0.5 = \cfrac{0.5 \text{ x 100}}{100} = \(\text{0.5 x 100} % = 50%

Example 2:
Convert 4.5 into its equivalent per cent.

4.5 = \cfrac{45}{10} = \cfrac{45 \text{ x 10}}{10 \text{ x 10}} = \cfrac{450}{100} = 450%

OR

4.5 = \cfrac{4.5 \text{ x 100}}{100} = \(\text{4.5 x 100} % = 450%

How to convert Per Cent into Decimal

To convert a per cent into an equivalent decimal, change the per cent into a fraction and then to decimal. See the examples given below for better understanding.

Example 1:
Convert 25% into decimal.

25% = \cfrac{25}{100} = 0.25

Example 2:
Convert 70% into decimal.

70% =\cfrac{70}{100} = 0.70 = 0.7

Example 3:
Convert 4% into decimal.

4% = \cfrac{4}{100} = 0.04

Example 4:
Convert 127% into decimal.

127% = \cfrac{127}{100} = 1.27

Click on Next button to see solved examples on the chapter Percentage for Class 5 Mathematics.

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