Subtract 35/72 from 42/21
1st number: 2 0/21, 2nd number: 35/72
42/21 - 35/72 is 109/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
42/21 = 42 × 24/21 × 24 = 1008/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
35/72 = 35 × 7/72 × 7 = 245/504 - Subtract the two like fractions:
1008/504 - 245/504 = 1008 - 245/504 = 763/504 - After reducing the fraction, the answer is 109/72
- In mixed form: 137/72
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