Subtract 56/21 from 72/18
1st number: 4 0/18, 2nd number: 2 14/21
72/18 - 56/21 is 4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
72/18 = 72 × 7/18 × 7 = 504/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
56/21 = 56 × 6/21 × 6 = 336/126 - Subtract the two like fractions:
504/126 - 336/126 = 504 - 336/126 = 168/126 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
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