Subtract 30/21 from 49/12
1st number: 4 1/12, 2nd number: 1 9/21
49/12 - 30/21 is 223/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
49/12 = 49 × 7/12 × 7 = 343/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Subtract the two like fractions:
343/84 - 120/84 = 343 - 120/84 = 223/84 - In mixed form: 255/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/12-30/21 49/12-60/21 49/24-30/21 49/12-30/42 49/12-90/21 49/36-30/21 49/12-30/63 49/60-30/21 49/84-30/21