# Sam buys a lamp during the sale. There was a discount of 20%. If the original price is \$4, what is the sale price?

-

## 4/100 = x/80

100x = 320
x = 3.20

or

take .2(\$4) = \$ .80
after discount, cost = \$ 4.00 - .80 = \$3.20

## To find the sale price, we need to find 80% of the original price.

Let's calculate it step by step:

Step 1: Calculate 80% of the original price.
80% of \$4 = 0.8 * \$4 = \$3.20

So, the sale price of the lamp is \$3.20.

## To find the sale price, we first need to calculate the discount amount. We can do this by multiplying the original price by the discount percentage.

Discount amount = Original price * Discount percentage

In this case, the original price is \$4 and the discount percentage is 20% (or 0.2 in decimal form).

Discount amount = \$4 * 0.2 = \$0.80

So the discount amount is \$0.80.

To find the sale price, we subtract the discount amount from the original price.

Sale price = Original price - Discount amount

Sale price = \$4 - \$0.80 = \$3.20

Therefore, the sale price of the lamp is \$3.20.

In proportion form, we can write this as:

Original price : Sale price = \$4 : \$3.20