Answer:
Half of the apple is 31% of the total size, so it’s 0.31×180=55.8
.
A quarter of the apple is 12% of the total size, so it’s 0.12×180=21.6
.
The total size of these parts is 55.8+21.6=77.4
.
So, the remainder of the apple is 180−77.4=102.6
.
Therefore, the remainder of the apple is 102.6.
Explanation: