About this topic
Before you begin
Find an original amount from a percentage and calculate percentage change using the correct reference whole.
Learning goals
- Find an increase as a percentage of the original
- Find a decrease as a percentage of the original
- Recover a whole or original amount from a percentage part
Syllabus statements covered
- Finding the whole given a part and the percentage
- Finding percentage increase/decrease
In this topic
Reverse percentages and percentage change
Identify the original whole before finding it or measuring a change.