Subtract 27/21 from 9/60, Solve 9/60

Subtract 27/21 from 9/60

1^st number: 9/60, 2^nd number: 1 6/21

9/60 - 27/21 is -159/140.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
9/60 = 9 × 7/60 × 7 = 63/420
Likewise, for the 2nd fraction, since 21 × 20 = 420,
27/21 = 27 × 20/21 × 20 = 540/420
Subtract the two like fractions:
63/420 - 540/420 = 63 - 540/420 = -477/420
After reducing the fraction, the answer is -159/140

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