Subtract 28/63 from 7/54
7/54 - 28/63 is -17/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
28/63 = 28 × 6/63 × 6 = 168/378 - Subtract the two like fractions:
49/378 - 168/378 = 49 - 168/378 = -119/378 - After reducing the fraction, the answer is -17/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/54-28/63 7/54-56/63 21/54-28/63 7/54-84/63 35/54-28/63 49/54-28/63