Percentage Calculator

X is what % of Y, percentage increase or decrease. Fast, precise, real-time calculations.

Math & Percent

1. Calculate Percentage Value

Formula: What is X% of Y?

Percentage (X)

Of Amount (Y)

What is 15% of 200?30

2. Percentage Share

Formula: X is what % of Y?

Part Value (X)

Total Value (Y)

45 is what % of 150?30%

3. Percentage Change

Formula: % Change from V1 to V2

Initial (V1)

Final (V2)

% Change from 80 to 100+25%

1. Choose from 3 calculation modes (What is X% of Y, X is what % of Y, or % Change from V1 to V2).
2. Enter numbers into the side-by-side input fields.
3. View formatted calculation results and live natural English equation sentence.

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