Subtract 54/49 from 20/27
1st number: 20/27, 2nd number: 1 5/49
20/27 - 54/49 is -478/1323.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 49 is 1323
Next, find the equivalent fraction of both fractional numbers with denominator 1323 - For the 1st fraction, since 27 × 49 = 1323,
20/27 = 20 × 49/27 × 49 = 980/1323 - Likewise, for the 2nd fraction, since 49 × 27 = 1323,
54/49 = 54 × 27/49 × 27 = 1458/1323 - Subtract the two like fractions:
980/1323 - 1458/1323 = 980 - 1458/1323 = -478/1323
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-54/49 20/54-54/49 20/27-54/98 60/27-54/49 20/81-54/49