Percent Calculators
Four scenarios, zero mystery: discount, sales tax, tip, and percent change. Every answer comes with the full working shown step by step.
1 Calculators
Pick a scenario below. Nothing is hidden — every answer shows each step.
Discount: price + percent off
Find the discount, then subtract it — or pay (100 − p)% directly.
Sales tax: price + tax rate
Tax is a percent added to the price you actually pay.
Tip: bill + tip percent
The classic restaurant math — with the 10% + 5% mental trick in the steps.
Percent change: old → new
Change ÷ original — the denominator is the classic trap.