Subtract 18/27 from 28/7
1st number: 4 0/7, 2nd number: 18/27
28/7 - 18/27 is 10/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
28/7 = 28 × 27/7 × 27 = 756/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189 - Subtract the two like fractions:
756/189 - 126/189 = 756 - 126/189 = 630/189 - After reducing the fraction, the answer is 10/3
- In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-18/27 28/7-36/27 28/14-18/27 28/7-18/54 84/7-18/27 28/7-54/27 28/21-18/27 28/7-18/81 28/7-90/27 28/35-18/27 28/49-18/27