Subtract 42/10 from 12/27, Solve 12/27

Subtract 42/10 from 12/27

1^st number: 12/27, 2^nd number: 4 2/10

12/27 - 42/10 is -169/45.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 27 × 10 = 270,
12/27 = 12 × 10/27 × 10 = 120/270
Likewise, for the 2nd fraction, since 10 × 27 = 270,
42/10 = 42 × 27/10 × 27 = 1134/270
Subtract the two like fractions:
120/270 - 1134/270 = 120 - 1134/270 = -1014/270
After reducing the fraction, the answer is -169/45

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