Arithmeticeasy · Past Paper
If x/y = 4/5, find (5x-3y) : (5x+3y).
A5:35
B1:7
C4:5
D9:11
✓ Correct Answer: B — 1:7
(5*4 - 3*5) : (5*4 + 3*5) = (20-15) : (20+15) = 5:35 = 1:7.
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