What will be the percentage decrease,if the salary is decreased in a single shot?

Question

A persons salary is decreased by steps of 25%, 15% and 10%.
What will be the percentage decrease,if the salary is decreased in a single shot?

Answer 1

42.625% decrease

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Decrease - 25% = 0.75 times
Decrease -15 %= 0.85 times
Decrease -10% = 0.9 times
Overall ---> 0.75*0.85*0.9= 0.57375 times or 0.42625= 42.625% decrease