Answer:
B. Multiplying by
is the same as multiplying by 80%.
Explanation:
Let x be the original price of item.
We have been given that the sale price of an item is four-fifths the original price of the item.
Let us find the sale price of item.


Let us convert 0.8 into percentage by multiplying by 100%.


Therefore, the sale price of the item could be figured out by
and
because Multiplying by
is the same as multiplying by 80%.