Question

There are 170000 cows. 10 percent of them die each year. How many cows will be left after 20 years have passed?

Answer 1

The answer is 153,000

Answer 2

153,000 cows. 170000-10%=153,000
170,000-30%=119,000 cows would be left after 20 years. I just added 20 to 10% to make 30% and subtracted 170,000-30% and got 119,000. Hope it helps. But not sure if that’s right