Subtract 1/7 from 28/54
28/54 - 1/7 is 71/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
28/54 = 28 × 7/54 × 7 = 196/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
1/7 = 1 × 54/7 × 54 = 54/378 - Subtract the two like fractions:
196/378 - 54/378 = 196 - 54/378 = 142/378 - After reducing the fraction, the answer is 71/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54-1/7 28/54-2/7 28/54-1/14 84/54-1/7 28/54-3/7 28/54-1/21 28/54-5/7 28/54-1/35 28/54-1/49