Convert the percentage to a fraction or decimal
Use the formula: part = whole × percent
Use the formula: percent = part ÷ whole × 100
Use the formula: whole = part ÷ percent
For finding a percentage of a number, multiply the number by the decimal form of the percentage
For finding what percent one number is of another, divide the part by the whole and multiply by 100
For finding the original amount after a percentage increase or decrease, set up the equation using the new amount and the percent change
Simplify the result if needed
Check that the answer makes sense in context