Subtract 8/7 from 72/27
1st number: 2 18/27, 2nd number: 1 1/7
72/27 - 8/7 is 32/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 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 7 × 27 = 189,
8/7 = 8 × 27/7 × 27 = 216/189 - Subtract the two like fractions:
504/189 - 216/189 = 504 - 216/189 = 288/189 - After reducing the fraction, the answer is 32/21
- In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/27-16/7 72/54-8/7 72/27-8/14 72/27-24/7 72/81-8/7 72/27-8/21 72/27-40/7 72/27-8/35 72/27-56/7 72/27-8/49