What is 2% of 40? 0.8 2% of 40 Copy 2% of 40 = 0.8. Formula UsedResult = (2 ÷ 100) × 40 = 0.8 Frequently Asked Questions What is 2% of 40?0.8. (2 ÷ 100) × 40 = 0.8.How to calculate 2%?Multiply by 0.02 (or multiply by 2 then divide by 100).