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Smart Percentage Calculator - All-in-One Math Tool
Master percentage calculations with 6 powerful modes! Calculate discounts, tax, tips, grade scores, salary changes, and investment returns. Perfect for students, shoppers, and professionals.
Calculation Type
What is X% of Y?
Common Examples
🛍️ Shopping Discounts
Find the sale price of an item with a 25% discount
Original price: $100 → Sale price: $75
📚 Test Scores
Calculate what percentage 85 out of 100 is
85 is 85% of 100
💰 Salary Increase
Calculate percentage change from $50,000 to $55,000
+10% increase
Percentage Formulas
Basic Percentage
Percentage of X = (Percent × X) ÷ 100Find Percentage
X is what % of Y = (X ÷ Y) × 100Percentage Change
% Change = ((New - Old) ÷ Old) × 100Find the Whole
Whole = Part ÷ (Percent ÷ 100)