Select the smallest ratio among following. A- 5 : 7 B- 4 : 5 C- 9 : 10 D- 3 : 4
A
Convert each ratio to a decimal to compare them.
A: \(\frac{5}{7}\) ≈ 0.714; B: \(\frac{4}{5}\) = 0.8; C: \(\frac{9}{10}\) = 0.9; D: \(\frac{3}{4}\) = 0.75.
Arranging: 0.714 < 0.75 < 0.8 < 0.9, so 5 : 7 is the smallest ratio.
Hence, the answer is A (5 : 7).
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