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25 Sep 2019, 00:48
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B
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Difficulty:
5%
(low)
Question Stats:
89% (00:52) correct
11%
(00:58)
wrong
based on 71
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The value of a certain stock rose by 40 percent from March to April, and then decreased by 30 percent from April to May. The stock’s value in May was what percent of its value in March?
A. 90%
B. 98%
C. 110%
D. 130%
E. 142%
A. 90%
B. 98%
C. 110%
D. 130%
E. 142%
25 Sep 2019, 03:51
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Let the value of the Stock be $100 in March,
--> In April, increased by 40% --> 140$,
--> In May, decreased by 30%--> 140-140*30%=140-42= $98
in March --$100.
in May--$98 --> The stock's value in May was 98% of its value in March.
The answer is B.
--> In April, increased by 40% --> 140$,
--> In May, decreased by 30%--> 140-140*30%=140-42= $98
in March --$100.
in May--$98 --> The stock's value in May was 98% of its value in March.
The answer is B.
27 Sep 2019, 08:48
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Bunuel
The stock value in March was n, the value in May was n x 1.4 x 0.7 = 0.98n.
Alternate Solution:
Let the starting value of the stock be 100. After a 40 percent increase, its value in April was 100 x 1.4 = 140. Then, after a 30 percent decrease, the value in May was 140 x 0.7 = 98. Thus, its value in May was 98/100, or 0.98 = 98% of its value in March.
Answer: B
