Subtract 21/3 from 12/18
1st number: 12/18, 2nd number: 7 0/3
12/18 - 21/3 is -19/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 3 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
12/18 = 12 × 1/18 × 1 = 12/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
21/3 = 21 × 6/3 × 6 = 126/18 - Subtract the two like fractions:
12/18 - 126/18 = 12 - 126/18 = -114/18 - After reducing the fraction, the answer is -19/3
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