Percentage is anything per 100 expressed in % symbol. This is an online calculator to find out how much percent is a number (x) in another number (y). It can also be said as the % of a fraction. (i.e.,) % of x in y. This can be also expressed as % of (x / y) where (x / y) is a fraction. This fraction is multiplied with 100 to find the result. Enter the values of x and y into the calculator to find the percentage.