What is 3% of 100? 3 3% of 100 Copy 3% of 100 = 3. Formula UsedResult = (3 ÷ 100) × 100 = 3 Frequently Asked Questions What is 3% of 100?3. (3 ÷ 100) × 100 = 3.How to calculate 3%?Multiply by 0.03 (or multiply by 3 then divide by 100).