Subtract 72/7 from 30/27
1st number: 1 3/27, 2nd number: 10 2/7
30/27 - 72/7 is -578/63.
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,
30/27 = 30 × 7/27 × 7 = 210/189 - Likewise, for the 2nd fraction, since 7 × 27 = 189,
72/7 = 72 × 27/7 × 27 = 1944/189 - Subtract the two like fractions:
210/189 - 1944/189 = 210 - 1944/189 = -1734/189 - After reducing the fraction, the answer is -578/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/27-72/7 30/54-72/7 30/27-72/14 90/27-72/7 30/81-72/7 30/27-72/21 30/27-72/35 30/27-72/49