Master Percent Change
Increase or decrease a number by a percent, and find percentage change between two values. Practice with instant feedback.
What is Percent Change?
Increase, decrease, and comparing two values
Percent change tells you how much a quantity grows or shrinks relative to its starting value. Increase X by Y% means multiply by (1 + Y/100). Decrease uses (1 − Y/100). Percentage change from A to B is ((B − A) / A) × 100.
Method
Percent change tells you how much a quantity grows or shrinks relative to its starting value.
Practice Percent Change →Percent Change Rules
Key steps
Follow the method
Percent change tells you how much a quantity grows or shrinks relative to its starting value. Increase X by Y% means multiply by (1 + Y/100). Decrease uses (1 − Y/100). Percentage change from A to B is ((B − A) / A) × 100.
Check your answer
Compare with the multiple-choice options and use inverse operations to verify.
Percent Change Examples
Worked examples
Basic Examples
Why Percent Change Matters
Percent change tells you how much a quantity grows or shrinks relative to its starting value. Increase X by Y% means multiply by (1 + Y/100). Decrease uses (1 − Y/100). Percentage change from A to B is ((B − A) / A) × 100.
Applications
Used in school exams, homework, and real-world number problems.
Start Practicing Percent Change
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