Subtract 49/40 from 30/7
1st number: 4 2/7, 2nd number: 1 9/40
30/7 - 49/40 is 857/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
30/7 = 30 × 40/7 × 40 = 1200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
49/40 = 49 × 7/40 × 7 = 343/280 - Subtract the two like fractions:
1200/280 - 343/280 = 1200 - 343/280 = 857/280 - In mixed form: 317/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-49/40 30/7-98/40 30/14-49/40 30/7-49/80 90/7-49/40 30/21-49/40 30/35-49/40 30/49-49/40