A company's profit increased x percent in 1980 than 1975,

Question

A company's profit increased x percent in 1980 than 1975, and increased y percent in 1985 than in 1980, is percent increased in 1985 than 1975 > 1/10?

1) x/y > 3/4
2) y/x > 4/5

ywilfred · Answer

St1:

4x > 3y
-> can't tell if x > y. Could be the other way round. Also, we don't have real numbers to work with.

St2:
5y > 4x
-> same argument as applied to St1. Insufficient.

Using St1 and St2:

We know x > y. but we can't tell how much more... Insufficient.

Ans E

kapslock · Answer

Question is y/x > 1/10?

a) x/y > 3/4 => y/x<4/3 Insufficient.
b) y/x>4/5 Sufficient. Since y/x > 0.8 is obviously greater than 0.1.

Prof, did you answer E because
1. Percentage increase IN 1985 cannot be determined (all we know is increase over 5 years, and
2. Increase in 1975 is unknown (increase in 1980 over 1975 is known).

????

Or am I missing out on something?

Professor · Answer

agree with you that the question is incomplete. therefore i chose E. 

ok, suppose it is 1980 instead 1975. 

1975 = 100
1980 = 104
1985 = 109

% increase in 1980 = 4%
% increase in 1985 = 4.8%
x/y = 4/4.8 > 3/4
y/x = 4.8/4 > 4/5

A company's profit increased x percent in 1980 than 1975,

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