Question

How much of the shape A is required to make one shape B?

Answer 1

Shape A represnts $\frac{1}{4}$th of the circle
while Shape B represents $\frac{3}{4}$th of the circle.
3 $\times \frac{1}{4}=3\frac{1}{4}$
3 pieces of shape A = Shape B


Hence, 3 pieces of shape A are needed to make shape B.