Joe has eaten 3/5 of a pizza, Jane has eaten 1/7 of a pizza.

How many times more pizza has Joe eaten more than Jane?


Compared to Jenny, Sally is 7/8 as tall and May is 6/7 as tall.

How much taller is Sally than May?


So confused, they may be really simple but i've read it too many times and it dosn't make sense anymore haha.