Subtract 18/10 from 21/12
1st number: 1 9/12, 2nd number: 1 8/10
21/12 - 18/10 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 10 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 10 × 6 = 60,
18/10 = 18 × 6/10 × 6 = 108/60 - Subtract the two like fractions:
105/60 - 108/60 = 105 - 108/60 = -3/60 - After reducing the fraction, the answer is -1/20
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