Year 10 Interactive Maths - Second Edition

Percentage Increase

Example 10

The price of a printer increases from $400 to $550. Express this increase as a percentage of the original price.

Solution:

Problem Solving

Example 11

25% of a certain number is 56. Find the number.

Solution:

Example 12

A family spends 20 per cent of its income on mortgage repayments of $145 per week. Calculate the weekly income of the family.

Solution:

Key Terms

percentage increase