Subtract 27/7 from 54/36, Solve 1 18/36

Subtract 27/7 from 54/36

1^st number: 1 18/36, 2^nd number: 3 6/7

54/36 - 27/7 is -33/14.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
54/36 = 54 × 7/36 × 7 = 378/252
Likewise, for the 2nd fraction, since 7 × 36 = 252,
27/7 = 27 × 36/7 × 36 = 972/252
Subtract the two like fractions:
378/252 - 972/252 = 378 - 972/252 = -594/252
After reducing the fraction, the answer is -33/14

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