What is 6% of 90? 5.4 6% of 90 Copy 6% of 90 = 5.4. Formula UsedResult = (6 ÷ 100) × 90 = 5.4 Frequently Asked Questions What is 6% of 90?5.4. (6 ÷ 100) × 90 = 5.4.How to calculate 6%?Multiply by 0.06 (or multiply by 6 then divide by 100).