Subtract 56/49 from 72/21
1st number: 3 9/21, 2nd number: 1 7/49
72/21 - 56/49 is 16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
72/21 = 72 × 7/21 × 7 = 504/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
56/49 = 56 × 3/49 × 3 = 168/147 - Subtract the two like fractions:
504/147 - 168/147 = 504 - 168/147 = 336/147 - After reducing the fraction, the answer is 16/7
- In mixed form: 22/7
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