To make it easier first convert the percent into a decimal by moving the decimal point to the left and removing the percent sign;
48% = 0.48
Now since the decimal is in the hundredths place we must place 100 as our denominator and 48 as our numerator;
48/100 and in simplest form is: 12/25
So 48% in simplest form fraction is 12/25
Hope that helps :D