What is 8% of 15? 1.2 8% of 15 Copy 8% of 15 = 1.2. Formula UsedResult = (8 ÷ 100) × 15 = 1.2 Frequently Asked Questions What is 8% of 15?1.2. (8 ÷ 100) × 15 = 1.2.How to calculate 8%?Multiply by 0.08 (or multiply by 8 then divide by 100).