Subtract 18/5 from 21/14
1st number: 1 7/14, 2nd number: 3 3/5
21/14 - 18/5 is -21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 5 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 14 × 5 = 70,
21/14 = 21 × 5/14 × 5 = 105/70 - Likewise, for the 2nd fraction, since 5 × 14 = 70,
18/5 = 18 × 14/5 × 14 = 252/70 - Subtract the two like fractions:
105/70 - 252/70 = 105 - 252/70 = -147/70 - After reducing the fraction, the answer is -21/10
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