Subtract 21/3 from 49/18
1st number: 2 13/18, 2nd number: 7 0/3
49/18 - 21/3 is -77/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 3 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
49/18 = 49 × 1/18 × 1 = 49/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
21/3 = 21 × 6/3 × 6 = 126/18 - Subtract the two like fractions:
49/18 - 126/18 = 49 - 126/18 = -77/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/18-21/3 49/18-42/3 49/36-21/3 49/18-21/6 49/18-63/3 49/54-21/3 49/18-21/9 49/90-21/3 49/18-21/15