Revenue - Expenses = Gross Profit
R - E = G
Stmt I
In 1999 Company X's gross profit was 1/3 of its expenses
1/3E = G
E=3G
R - E = 1/3E
We can get to Company X's gross profit was what percent of its revenue from here SO SUFF
No need to solve but just for the records:
R = 4/3E
R = 4/3*3G
R = 4G
G = 1/4R = 25%
Stmt II
In 1999 Company X's expenses were 3/4 of its revenue
R - E = G
R - 3/4R = G
We can get to the relationship between R and G and hence the %.
SUFF
If we were to solve (not needed since its a DS)
R(1-3/4) = G
1/4*R = G
Choose D
In 1999
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Source: Beat The GMAT — Data Sufficiency |












