What is 5% of 30? 1.5 5% of 30 Copy 5% of 30 = 1.5. Formula UsedResult = (5 ÷ 100) × 30 = 1.5 Frequently Asked Questions What is 5% of 30?1.5. (5 ÷ 100) × 30 = 1.5.How to calculate 5%?Multiply by 0.05 (or multiply by 5 then divide by 100).