Subtract 27/10 from 12/28, Solve 12/28

Subtract 27/10 from 12/28

1^st number: 12/28, 2^nd number: 2 7/10

12/28 - 27/10 is -159/70.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 28 × 5 = 140,
12/28 = 12 × 5/28 × 5 = 60/140
Likewise, for the 2nd fraction, since 10 × 14 = 140,
27/10 = 27 × 14/10 × 14 = 378/140
Subtract the two like fractions:
60/140 - 378/140 = 60 - 378/140 = -318/140
After reducing the fraction, the answer is -159/70

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