Subtract 90/7 from 27/60, Solve 27/60

Subtract 90/7 from 27/60

1^st number: 27/60, 2^nd number: 12 6/7

27/60 - 90/7 is -1737/140.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
27/60 = 27 × 7/60 × 7 = 189/420
Likewise, for the 2nd fraction, since 7 × 60 = 420,
90/7 = 90 × 60/7 × 60 = 5400/420
Subtract the two like fractions:
189/420 - 5400/420 = 189 - 5400/420 = -5211/420
After reducing the fraction, the answer is -1737/140

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