Subtract 56/21 from 72/27
1st number: 2 18/27, 2nd number: 2 14/21
72/27 - 56/21 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
72/27 = 72 × 7/27 × 7 = 504/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
56/21 = 56 × 9/21 × 9 = 504/189 - Subtract the two like fractions:
504/189 - 504/189 = 504 - 504/189 = 0/189 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/54-56/21 72/27-56/42 72/81-56/21 72/27-56/63