What is 30% of 10? 3 30% of 10 Copy 30% of 10 = 3. Formula UsedResult = (30 ÷ 100) × 10 = 3 Frequently Asked Questions What is 30% of 10?3. (30 ÷ 100) × 10 = 3.How to calculate 30%?Multiply by 0.3 (or multiply by 30 then divide by 100).