3-4Example 2

Dale got a score of 70 on his science exam. He was able to retake the test and scored a 77.5. Find the percent of change in the test scores. Round to the nearest whole percent.

1. The original amount is 70.

The new amount is 77.5.

3-4Example 2

Dale got a score of 70 on his science exam. He was able to retake the test and scored a 77.5. Find the percent of change in the test scores. Round to the nearest whole percent.

2. Substitute the values in the formula.

3-4Example 2

Dale got a score of 70 on his science exam. He was able to retake the test and scored a 77.5. Find the percent of change in the test scores. Round to the nearest whole percent.

3. Simplify.

Round to the nearest whole percent.

11%

10.7%

3-4Example 2

Dale got a score of 70 on his science exam. He was able to retake the test and scored a 77.5. Find the percent of change in the test scores. Round to the nearest whole percent.

4. The value is positive.

11% increase