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Ratio of Variables

ACTMAT-NJKJNE

If:

$$ \frac { j-k }{ k } =\frac { 3 }{ 8 } $$

...then $ \cfrac { j }{ k } = ?$

A

$ \cfrac { 5 }{ 8 } $

B

$ \cfrac { 1 }{ 4 } $

C

$ \cfrac { 11 }{ 8 } $

D

$ -\cfrac { 5 }{ 8 } $

E

$ \cfrac { 1 }{ 2 } $