Answer:
Bigger by ¼ of a.
Step-by-step explanation:
Let b be represented by all five slices of the pie, and a by the four yellow slices.
Then a is ⅘ of the pie and it is ⅕ smaller than b.
Now, let's turn the argument around.
The four yellow slices represent a, and all 5 slices represent b.
b is greater than a by one slice compared to four.
In mathematical terms, b is bigger by ¼ of a.
