Final answer:
To calculate the percent of decrease in membership, subtract the final value from the initial value and divide by the initial value. Multiply the result by 100 to get the percentage.
Step-by-step explanation:
To calculate the percent of decrease in membership, we need to determine the difference between the two values and divide it by the initial value. In this case, the initial value is 120 members and the final value is 87 members.
The difference between 120 and 87 is 33. To find the percent of decrease, divide 33 by 120 and multiply by 100.
The percent of decrease in membership is 27.5%.
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