Joe has eaten 2/5 of a pizza. James has eaten 1/7. How many times more pizza has Joe eaten than James?

First let's make the denominators of the fractions equal.

To do this, we have to find a number which both 5 and 7 divide into.

The smallest number that does this is 35.

2 - - > Multiply the numerator by 7

--

5 - - > Multiply the denominator by 7 to get 35

= 14/35

1 - - > Multiply the numerator by 5

--

7 - - > Multiply the denominator by 5 to get 35

= 5/35

Joe has eaten 14/35 and James has eaten 5/35.

14 / 5 = 2.8

Joe has eaten 2.8 (or 2 4/5) times more pizza than James.