What is 1% of 30? 0.3 1% of 30 Copy 1% of 30 = 0.3. Formula UsedResult = (1 ÷ 100) × 30 = 0.3 Frequently Asked Questions What is 1% of 30?0.3. (1 ÷ 100) × 30 = 0.3.How to calculate 1%?Multiply by 0.01 (or multiply by 1 then divide by 100).