He sold the goat at 2 10% profit so he sold the goat for: 15,000 x 1.10 = 16,500
He sold the cow for a loss, so he sold the cow for 35000 x 0.80 = 28,000
Total he paid for both: 15,000 + 35,000 = 50,000
Total he sold both for: 16,500 + 28,000 = 44,500
He sold them for less than what he paid so he lost money.
Subtract sold amount from bought amount:
50,000 - 44,500 = 5,500
Divide the difference by the amount he paid:
5,500 / 50,000 = 0.11 x 100 = 11%
His loss percentage was 11%
