Subtract 49/21 from 27/18
1st number: 1 9/18, 2nd number: 2 7/21
27/18 - 49/21 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
49/21 = 49 × 6/21 × 6 = 294/126 - Subtract the two like fractions:
189/126 - 294/126 = 189 - 294/126 = -105/126 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-49/21 27/18-98/21 27/36-49/21 27/18-49/42 81/18-49/21 27/54-49/21 27/18-49/63 27/90-49/21