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If m 4 n 9 and r 16 evaluate frac m n - 1 frac ... - WAEC Mathematics 2015 Question

If m = 4, n = 9 and r = 16., evaluate \(\frac{m}{n}\) - 1\(\frac{7}{9}\) + \(\frac{n}{r}\)
A
1\(\frac{5}{16}\)
B
1\(\frac{1}{16}\)
C
\(\frac{5}{16}\)
D
- 1\(\frac{37}{48}\)
correct option: d

If m = 4, n = 9, r = 16,

then (\frac{m}{n}) - 1(\frac{7}{9}) + (\frac{n}{r})

= (\frac{4}{9}) - (\frac{16}{9}) + (\frac{9}{16})

= (\frac{64 - 258 + 81}{144})

= (\frac{-111}{144})

= - 1(\frac{37}{48})

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