Subtract 70/63 from 27/60, Solve 27/60

Subtract 70/63 from 27/60

1^st number: 27/60, 2^nd number: 1 7/63

27/60 - 70/63 is -119/180.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 60 × 21 = 1260,
27/60 = 27 × 21/60 × 21 = 567/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
70/63 = 70 × 20/63 × 20 = 1400/1260
Subtract the two like fractions:
567/1260 - 1400/1260 = 567 - 1400/1260 = -833/1260
After reducing the fraction, the answer is -119/180

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