Steps to Convert the Ratio to a Percentage To convert a ratio to a percentage, express it as a fraction and then multiply by 100. Write the ratio as a fraction: The ratio 17:25 is the same as the fraction 17/25 Divide the numerator by the denominator:17\25=0.68 Multiply the result by 100:\(0.68\times 100=68\)Add the percentage sign:\(68\%\) You can also use an online Ratio to Percentage Calculator to check your work.