Subtract 42/10 from 12/54, Solve 12/54

Subtract 42/10 from 12/54

1^st number: 12/54, 2^nd number: 4 2/10

12/54 - 42/10 is -179/45.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 10 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 54 × 5 = 270,
12/54 = 12 × 5/54 × 5 = 60/270
Likewise, for the 2nd fraction, since 10 × 27 = 270,
42/10 = 42 × 27/10 × 27 = 1134/270
Subtract the two like fractions:
60/270 - 1134/270 = 60 - 1134/270 = -1074/270
After reducing the fraction, the answer is -179/45

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