What is 6% of 40? 2.4 6% of 40 Copy 6% of 40 = 2.4. Formula UsedResult = (6 ÷ 100) × 40 = 2.4 Frequently Asked Questions What is 6% of 40?2.4. (6 ÷ 100) × 40 = 2.4.How to calculate 6%?Multiply by 0.06 (or multiply by 6 then divide by 100).