Answer:
Return on investment is decreased by 3.30%
Explanation:
The computation of the return on investment is shown below:
= (Controllable margin ÷ operating assets) × 100
= ($93,000 ÷ $300,000) × 100
= 31%
Now the new controllable margin equals to
= $93,000 + $15,000
= $108,000
And, the new operating assets would be
= $300,000 + $90,000
= $390,000
So, the new return on investment equals to
= ($108,000 ÷ $390,000) × 100
= 27.70%
The return on investment is decreased by
= 31% - 27.70%
= 3.30%