At the school store, colored pencils are reduced from $2.40 a box to $2.00 a box. What is the percent of decrease?

.4*100/2.40 = 16.7

At the school store, colored pencils are reduced from $2.40 a box to $2.00 a box. What is the percent of decrease?

To find the percent of decrease, we need to determine the difference between the original price and the reduced price, and then divide that difference by the original price. Finally, we multiply the result by 100 to convert it to a percentage.

Let's follow these steps:

Step 1: Determine the difference between the original price and the reduced price.
The original price of colored pencils is $2.40, and they are now sold for $2.00. So, the difference is:
$2.40 - $2.00 = $0.40

Step 2: Divide the difference by the original price.
Take the difference ($0.40) and divide it by the original price ($2.40):
$0.40 / $2.40 = 0.1667

Step 3: Multiply the result by 100 to get a percentage.
Multiply the decimal result by 100:
0.1667 * 100 = 16.67

So, the percent of decrease is approximately 16.67%.