Subtract 21/6 from 7/18
1st number: 7/18, 2nd number: 3 3/6
7/18 - 21/6 is -28/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 6 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
7/18 = 7 × 1/18 × 1 = 7/18 - Likewise, for the 2nd fraction, since 6 × 3 = 18,
21/6 = 21 × 3/6 × 3 = 63/18 - Subtract the two like fractions:
7/18 - 63/18 = 7 - 63/18 = -56/18 - After reducing the fraction, the answer is -28/9
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