Subtract 18/70 from 21/10
1st number: 2 1/10, 2nd number: 18/70
21/10 - 18/70 is 129/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
18/70 = 18 × 1/70 × 1 = 18/70 - Subtract the two like fractions:
147/70 - 18/70 = 147 - 18/70 = 129/70 - In mixed form: 159/70
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