What is 4% of 15? 0.6 4% of 15 Copy 4% of 15 = 0.6. Formula UsedResult = (4 ÷ 100) × 15 = 0.6 Frequently Asked Questions What is 4% of 15?0.6. (4 ÷ 100) × 15 = 0.6.How to calculate 4%?Multiply by 0.04 (or multiply by 4 then divide by 100).