Question : Direction: Study the bar diagram and answer the following question. The bar diagram shows the number of bicycles parked in the parking space of a hall at various points in time.
What is the percentage decrease in the number of parked cycles between 7 pm and 8 pm? (in whole numbers)
Option 1: 30
Option 2: 38
Option 3: 42
Option 4: 45
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Correct Answer: 45
Solution :
Number of bicycles parked at 7:00 p.m. = 45
Number of bicycles parked at 8:00 p.m. = 55
Percentage decrease
= $\frac{\text{The reduction in the number of parked cycles}}{\text{The number of parked cycles at 7 pm}}\times 100$.
= $\frac{(45-25)\times 100}{45}$
= 45% approx
Hence, the correct answer is 45.
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