What is 9% of 50? 4.5 9% of 50 Copy 9% of 50 = 4.5. Formula UsedResult = (9 ÷ 100) × 50 = 4.5 Frequently Asked Questions What is 9% of 50?4.5. (9 ÷ 100) × 50 = 4.5.How to calculate 9%?Multiply by 0.09 (or multiply by 9 then divide by 100).