The price of a cup of coffee was $2.85 yesterday. Today, the price fell to $2.50. Find the percentage decrease, Round your answer to the nearest tenth of a
percent

5.9%

Let's see what percentage of 2.55 is 2.40
or $2.40 = x% of $2.55

2.40 = (x/100)(2.55)
x = 2.40(100)/2.55
x = 240/2.55
x = 94.1%

$2.40 is 94.1% of $2.55

The decrease is from 100% to 94.1%

100-94.1 = 5.9% decrease in price