Answer:
56.67%
Step-by-step explanation:
Purchase cost = 30 dollars
Margin x price = 0.60x30 = $18
30-18 = $12
Profit = $47 - $30 - 0.07(12)
= 16.16
Percentage earned = (16.16 /18) * 100
= 89.78%
Profit from the trade
= 47-30
= 17
Percentage earned = 17/30 * 100
= 56.67%
The return would have been 56 67% if the investor had not done this.