Final answer:
The percent increase when 7,200 increases by 800 is calculated by dividing the increase by the original number and then multiplying by 100, which results in approximately an 11.11% increase.
Step-by-step explanation:
To calculate the percent increase when a value increases from 7,200 to 8,000, we use the formula:
Percent Increase = (Increase ÷ Original Number) × 100.
In this case, the increase is 800 (8,000 - 7,200), and the original number is 7,200. So we plug these values into the formula:
Percent Increase = (800 ÷ 7,200) × 100
Calculating this, we get:
Percent Increase = (0.1111...) × 100
Percent Increase = 11.11...
Therefore, the percent increase is approximately 11.11% when 7,200 increases by 800.