How to Calculate Percentages
💡 2M searches/mo💰 CPC: $1-3⏱️ 5 min read
Percentages are everywhere: discounts, taxes, tips, grades. Here is a complete guide to calculating any percentage problem.
Advertisement
Step-by-Step Guide
- Find X% of a number: multiply by X/100
- Percentage increase: ((new-old)/old) x 100
- Percentage decrease: ((old-new)/old) x 100
- Reverse: if X is Y% of what? Divide X by (Y/100)
- Percentage of total: (part/total) x 100
Frequently Asked Questions
How do I calculate a tip?
For 15%: multiply bill by 0.15. For 20%: multiply by 0.20.
How do I calculate a discount?
Multiply price by (1 - discount/100). 25% off $80 = $80 x 0.75 = $60.
How do I calculate tax?
Multiply price by tax rate (8.25% = 0.0825). Add to original price.
Advertisement
Related Tools