Final answer:
To determine the number of cans left, we solve for the original amount of cans where selling 220 cans leaves 80% of the stock. Then, we calculate 80% of the original total to get the number of cans remaining.
Step-by-step explanation:
The question is asking how many cans of cat food are left if a pet store sells 220 cans and has 80% of the original number of cans left. To find the answer, we need to determine what 100% would represent if 80% equals the remaining cans after 220 were sold.
We can set up the equation where the original amount of cans is X, and after selling 220 cans, 80% of X is left:
80% of X = X - 220
To find X, we rearrange the equation:
X = (X - 220) / 0.8
By solving this equation, we find the original number of cans (X) and then calculate 80% of it to obtain the number of cans left after the sale.