Original shirt cost: $55 Current shirt cost: $40
Find the percent of decrease.

(It’s not 27 or 15,)

Original cost = $55
Current price = $40
Decrease in price = 40-55 = -$15
Percentage decrease = [(New price - old price)/ old price] *100
Percentage decrease =
(40-55)/55] *100
= -0.272727 *100
= -27.27%
To a whole percentage = 27%
Therefore, the cost of the t-shirt decreased by 27%

Explanation:

It is 27