This percentage change calculator is designed for GCSE Maths students. It helps you calculate percentage increase, percentage decrease, a new value after a percentage change, or the original value before a change.
Percentage change questions are very common in GCSE exams and often involve comparing an original value with a new value. Understanding the method is just as important as getting the final answer.
The formula for percentage change is:
Percentage change = (Change ÷ Original value) × 100
Where:
Question:
An item costs £80 and its price increases to £100.
Calculate the percentage change.
Step 1: Find the change
Change = 100 − 80 = 20
Step 2: Divide by the original value
20 ÷ 80 = 0.25
Step 3: Multiply by 100
0.25 × 100 = 25%
Answer:
The price increased by 25%.