Subtract 27/7 from 18/24, Solve 18/24

Subtract 27/7 from 18/24

1^st number: 18/24, 2^nd number: 3 6/7

18/24 - 27/7 is -87/28.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168
Likewise, for the 2nd fraction, since 7 × 24 = 168,
27/7 = 27 × 24/7 × 24 = 648/168
Subtract the two like fractions:
126/168 - 648/168 = 126 - 648/168 = -522/168
After reducing the fraction, the answer is -87/28

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