Final answer:
The percentage decrease in the number of students is found by subtracting the current year's students from last year's, dividing by last year's number, and then converting to a percentage, which results in a 16.67% decrease.
Step-by-step explanation:
To calculate the percentage decrease in the number of students, you can use the following steps
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- Subtract the new number of students (current year) from the original number (last year). In this case, 900 students (last year) - 750 students (this year) = 150 students.
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- Divide the decrease by the original number (last year's number). So, you have 150 (decrease) ÷ 900 (original number) which equals approximately 0.1667.
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- Convert the result to a percentage by multiplying by 100. Thus, 0.1667 × 100 = 16.67%.
The percentage decrease in the number of students is 16.67%.