Final answer:
The chess club experienced a 37.5 percent decrease in membership, calculated by subtracting the final from the initial number of members, dividing by the initial number, and multiplying by 100.
Step-by-step explanation:
To find the percentage decrease in the membership of the chess club, we first need to figure out how many members left the club. This can be done by subtracting the final number of members from the original number of members. In this case, 32 (original members) - 20 (current members) equals 12 members who left.
Next, we'll calculate the percentage decrease. We do this by dividing the decrease in members (12 members) by the original number of members (32) and then multiplying by 100 to get the percentage. So, (12 / 32) * 100 equals a 37.5 percent decrease in membership.
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