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jlgdr
Joined: 06 Sep 2013
Last visit: 24 Jul 2015
Posts: 1,302
Given Kudos: 355
Concentration: Finance
Schools: Wharton '17 (A) HBS '17 (WA$)
20 Sep 2013, 17:18
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Difficulty:
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If y is decreased by 20% and then increased by 60%, what is the new number, expressed in terms of y?
A. 0.28y
B. 0.60y
C. 0.80y
D. 1.28y
E. 128y
A. 0.28y
B. 0.60y
C. 0.80y
D. 1.28y
E. 128y
02 Oct 2019, 14:21
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if y is decreased by 20% and then increased by 60%, what is the new number, expressed in terms of y?
Solution:
let x= number after increase then decrease
let y= initial value
x=(y(1-0.2))(1+0.6)
x=(y*(.8))*(1.6)
x=1.28y
Solution:
let x= number after increase then decrease
let y= initial value
x=(y(1-0.2))(1+0.6)
x=(y*(.8))*(1.6)
x=1.28y
