Question

4/5 of my cake is frosted. My cat licked off 1/7 of the frosting. How much of my frosting is left?

Answer 1

If the cat licked 1/7 of the frosting, it means that 6/7 of the frosting is still there. But only 4/5 of the cake was frosted.

So, the remaining frosted cake is 6/7 of 4/5. In formulas, we have to multiply the fractions:

$\dfrac{6}{7}\cdot\dfrac{4}{5}=\dfrac{24}{35}$