Question

The sale price of an item is four-fifths the original price of the item, x.

Answer 1

Answer:

B. Multiplying by $\frac{4}{5}$ is the same as multiplying by 80%.

Step-by-step 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.

$\text{Sale price}=\frac{4}{5}x$

$\text{Sale price}=0.8x$

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

$\text{Sale price}=(0.8)(100\%)x$

$\text{Sale price}=(80\%)x$

Therefore, the sale price of the item could be figured out by  $\frac{4}{5}x$ and $0.8x$ because Multiplying by $\frac{4}{5}$ is the same as multiplying by 80%.

Answer 2

B. Multiplying by 45 is the same as multiplying by 80%.