Lovely cuts her birthday cake into 12 equal pieces. Only one-fourth of the cake was eaten by her visitors and the rest were kept. How many slices of cake were kept?
12/4 = <T>divide(12, 4)=3.0 slices of cake were eaten by Lovely's visitors.
So, 12 - 3 = <T>subtract(12, 3)=9 slices of cake were kept.
