Subtract 18/70 from 21/14
1st number: 1 7/14, 2nd number: 18/70
21/14 - 18/70 is 87/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 70 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 70 × 1 = 70,
18/70 = 18 × 1/70 × 1 = 18/70 - Subtract the two like fractions:
105/70 - 18/70 = 105 - 18/70 = 87/70 - In mixed form: 117/70
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