A runner is running at a speed of 40 km/h. If he runs at a speed of 30 km/h, then what will the decrease in the percentage of his speed be?

A runner is running at a speed of 40 km/h. If he runs at a speed of 30

1.	A runner is running at a speed of 40 km/h. If he runs at a speed of 30 km/h, then what will the decrease in the percentage of his speed be?
A.	15%
B.	20%
C.	25%
D.	30%
Answer» D. 30%

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A runner is running at a speed of 40 km/h. If he runs at a speed of 30 km/h, then what will the decrease in the percentage of his speed be?

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