Mathematical Index & Solver
Percentage Calculations Directory
Browse 1,100+ fully-solved mathematical percentage problems. Every calculation includes copyable Excel and Google Sheets formulas, step-by-step solutions, and discount & sales tax breakdowns.
Most Frequently Searched Calculations
Universal Excel & Google Sheets Percentage Formulas
Calculate P% of Amount:
=A1 * 10%
Discounted Sale Price:
=A1 * (1 - 20%)
Add Sales Tax:
=A1 * (1 + 8.5%)
Calculations by Percentage Rate
Select standard rate tiers to view calculations across different values.
5%5% Calculations
Dec: 0.0510%10% Calculations
Dec: 0.1015%15% Calculations
Dec: 0.1520%20% Calculations
Dec: 0.2025%25% Calculations
Dec: 0.2530%30% Calculations
Dec: 0.3040%40% Calculations
Dec: 0.4050%50% Calculations
Dec: 0.50Calculations for Round Base Amounts
Calculate exact discounts and markdowns for benchmark sums.
Base: $100
Base: $500
Base: $1,000
Base: $2,000
Base: $5,000