Subtract 36/8 from 18/21
1st number: 18/21, 2nd number: 4 4/8
18/21 - 36/8 is -51/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
18/21 = 18 × 8/21 × 8 = 144/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
36/8 = 36 × 21/8 × 21 = 756/168 - Subtract the two like fractions:
144/168 - 756/168 = 144 - 756/168 = -612/168 - After reducing the fraction, the answer is -51/14
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