What 7.5x percent as ratio?

To express 7.5% as a ratio, you can convert it to a fraction. Since 7.5% is equivalent to 7.5 out of 100, it can be written as 7.5/100. To simplify, multiply both the numerator and denominator by 10, resulting in 75/1000. This can further be simplified to 3/40, so the ratio is 3:40.