Percentage Calculator Notes

  • How to Calculate Percentages

    X of Y: Find a specific percentage of a number.

    Example: What is 25% of 200? → 50

    What Percent: Find what percentage one number is of another.

    Example: What percent is 50 of 200? → 25%

    % Change: Calculate the percentage increase or decrease between two values.

    Example: Change from 100 to 150? → 50% increase

  • Formulas

    X of Y: (X / 100) × Y

    What Percent: (X / Y) × 100

    % Change: ((New - Old) / Old) × 100

  • Common Uses

    • Calculating discounts and sale prices
    • Determining tip amounts at restaurants
    • Tracking changes in prices or statistics
    • Calculating grades and test scores
    • Interest rates and financial calculations