Answer:
[tex]\large\boxed{\large\boxed{41\%}}[/tex]
Explanation:
You need to assume that the total expenses were equal to the cost of the supplies, i.e. there were not other expenses but the $1,500 for supplies to sell.
The total income or revenue was $3,700.
The percentage of the expenses to the revenue is:
[tex]Percentage=\dfrac{expenses}{revenue}\times 100\\\\\\ Percentage=\dfrac{\$1,500}{\$3,700}\times 100=40.5\%\approx41\%[/tex]
