The easiest way to express a fraction as decimal fraction is to covert to percentage and then divide by 100 12∕25 to percentage is simply multiplying by 100 12∕25×100=48% NOTE: 25 goes into 100, 4 times and 4×12=48 Now change the percentage to fraction 48%=48∕100=0.48 NOTE: 100=10×10=102 From the law of indices, 1∕an=a−n 48∕100=48∕(102)=48×1∕(102)=48×10−2=48.0×10−2 NOTE: Every number has .0 behind. Thus 48=48.0 Now change the 48.0×10−2 to decimals by moving the decimal point by the value of the power. If the power is negative you move to the left the value of the power times and if positive to the right. In 48.0×10−2,the decimal point is moved to the left 2 times which gives 0.48