Question

the attendance at a seminar in year 1 was 500. in year 2, the attendance changed by 100. what was the percent change in attendance?
the percent change was 0.2%.
the percent change was 0.4%.
the percent change was 20%.
the percent change was 40%.

Explanation:

Step1: Recall percent change formula

The formula for percent change is $\text{Percent Change} = \frac{\text{Change in Value}}{\text{Original Value}} \times 100\%$.

Step2: Identify values

Original attendance (Year 1) = 500, Change in attendance = 100.

Step3: Calculate percent change

Substitute into the formula: $\frac{100}{500} \times 100\% = 0.2 \times 100\% = 20\%$.

Answer:

The percent change was 20%. (Corresponding to the option: The percent change was 20%.)