The cost of a protein bar increased from $2.50 to $2.80. What is the percent increase?

The cost of a protein bar increased from $2.50 to $2.80. What is the percent increase?

• A. 16%
• B. 10%
• C. 15%
• D. 12%

Answer: (D)

To determine the percent increase in the cost of the protein bar, you start by calculating the difference between the new price and the old price. The new price is $2.80, and the old price is $2.50. First, you find the difference: $2.80 - $2.50 = $0.30. Next, to find the percent increase, you divide the difference by the original price: $0.30 ÷ $2.50 = 0.12. Lastly, to convert this decimal to a percentage, you multiply by 100: 0.12 × 100 = 12%. Thus, the percent increase in the cost of the protein bar is 12%. This method effectively measures how much the price has risen relative to its original cost, providing a clear view of the increase’s significance.

To determine the percent increase in the cost of the protein bar, you start by calculating the difference between the new price and the old price. The new price is $2.80, and the old price is $2.50.

First, you find the difference:

$2.80 - $2.50 = $0.30.

Next, to find the percent increase, you divide the difference by the original price:

$0.30 ÷ $2.50 = 0.12.

Lastly, to convert this decimal to a percentage, you multiply by 100:

0.12 × 100 = 12%.

Thus, the percent increase in the cost of the protein bar is 12%. This method effectively measures how much the price has risen relative to its original cost, providing a clear view of the increase’s significance.