Percent means "per hundred". You can express 12/25 with 100 as a denominator like this

12/25 = (12/25)*(4/4) = (12*4)/(25*4) = 48/100 = 48%

Or, you can divide it out

12/25 = .48 = .48*100% = 48%

12/25 = (12/25)*(4/4) = (12*4)/(25*4) = 48/100 = 48%

Or, you can divide it out

12/25 = .48 = .48*100% = 48%