Ratio, proportion and rates of changeKey Stage 3

Finding a percentage decrease

Calculate the percentage decrease from an original and a new amount.

  • Find the decrease: original amount minus new amount.
  • Divide the decrease by the original amount, then multiply by 100.

Example 1

A price falls from to . Find the percentage decrease.

Change
Divide by the original value, not the new value.

Example 2

A price falls from to . Find the percentage decrease.

Change
Divide by the original value, not the new value.

Your turn

Question 1

A price falls from to . Find the percentage decrease.

Check answer
Change
Divide by the original value, not the new value.
Question 2

A price falls from to . Find the percentage decrease.

Check answer
Change
Divide by the original value, not the new value.
Question 3

A price falls from to . Find the percentage decrease.

Check answer
Change
Divide by the original value, not the new value.
Question 4

A price falls from to . Find the percentage decrease.

Check answer
Change
Divide by the original value, not the new value.
Question 5

A price falls from to . Find the percentage decrease.

Check answer
Change
Divide by the original value, not the new value.
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