Mathematics for IGCSE & O level - Percentages (Section 3 - No. 3)
Which of the following statements are true regarding percentage change?
A percentage change is always relative to the original amount.
To calculate the percentage change, you need the original and the final amounts.
A percentage change can never be negative.
Both a percentage increase and decrease will alter the value.
Forklaring
Percentage change uses the original value as a comparison, and any alteration results in the change. Percentage change is always relative to its original value.