SOLUTION: An automobile’s speed increases by 25% and then decreases by 10%. What is the percentage change in speed compared to the automobile’s original speed?
(A) -15% (B) 1.25% (C) 15%
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Question 284306: An automobile’s speed increases by 25% and then decreases by 10%. What is the percentage change in speed compared to the automobile’s original speed?
(A) -15% (B) 1.25% (C) 15% (D) 12.5% (E) 125%
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
An automobile’s speed increases by 25% and then decreases by 10%. What is the percentage change in speed compared to the automobile’s original speed?
(A) -15% (B) 1.25% (C) 15% (D) 12.5% (E) 125%
-------------------
Original speed = 100 (to make it easier)
+25% --> 125
-10% --> 125*0.9 = 112.5
An increase of 12.5%
D
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