alleryWhich of these ratios is already in lowest terms?
A6:8
B5:7
C10:15
D9:12
Answer & Solution
Correct answer: B. 5:7
1. A ratio is in lowest terms when its integer terms share no common factor.
2. 6:8, 10:15 and 9:12 share factors 2, 5 and 3.
3. 5 and 7 share none, so 5:7 cannot be reduced.
_Source: Wikipedia, Ratio, Reduction_
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