Subtract 21/42 from 72/35
1st number: 2 2/35, 2nd number: 21/42
72/35 - 21/42 is 109/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
72/35 = 72 × 6/35 × 6 = 432/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Subtract the two like fractions:
432/210 - 105/210 = 432 - 105/210 = 327/210 - After reducing the fraction, the answer is 109/70
- In mixed form: 139/70
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