Discussion
What number should be subtracted from both terms of the fraction 15/19 to make it 3/4?
Answer: B
Let the number to be subtracted be x.
The new fraction is \(\frac{15-x}{19-x}\).
We are given that this equals 3/4.
\(\frac{15-x}{19-x} = \frac{3}{4}\)
Cross-multiply: \(4(15-x) = 3(19-x)\).
\(60 - 4x = 57 - 3x\).
\(60 - 57 = 4x - 3x\).
\(3 = x\).
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