Chapter 8 · ICSE Class 7 Mathematics

Percent and Percentage

Master converting between fractions, decimals, and percentages, and use percentages to solve everyday problems.

💯 Chapter 8

Converting between fraction, decimal, and percentage for three quarters A triangle showing three equivalent ways to write the same value: the fraction 3/4, the decimal 0.75, and the percentage 75 percent 3/4 0.75 75%
8.1

Converting Between Fractions, Decimals, and Percentages

Percent means 'out of 100'. To convert a fraction to a percentage, multiply by 100. To convert a percentage to a decimal, divide by 100.

1

Convert 3/4 to a percentage.

3/4 × 100 = 75%

2

Convert 35% to a decimal.

35 ÷ 100 = 0.35

8.2

Finding a Percentage of a Quantity

To find a percentage of a quantity, convert the percentage to a decimal or fraction, then multiply by the quantity.

1

Find 20% of 150.

0.20 × 150 = 30

2

A class has 40 students, and 60% are girls. How many girls are there?

0.60 × 40 = 24 girls

Practice

Exercises

1. Convert 2/5 to a percentage.

2. Convert 12% to a fraction in lowest terms.

3. Find 15% of 200.

4. Find 45% of 80.

5. A shop had 250 items, and 30% were sold. How many items were sold?

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