Reduce the fraction 40/72 to lowest terms.
A10/18
B20/36
C5/9
D4/7
Answer & Solution
Correct answer: C. 5/9
Both 40 and 72 share the factor 8: 40 = 8 times 5, and 72 = 8 times 9. So 40/72 = 5/9, which has no further common factor. Options A and B are equivalent to 40/72 but not yet at lowest terms.
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