Subtract 49/40 from 3/7
1st number: 3/7, 2nd number: 1 9/40
3/7 - 49/40 is -223/280.
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,
3/7 = 3 × 40/7 × 40 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
49/40 = 49 × 7/40 × 7 = 343/280 - Subtract the two like fractions:
120/280 - 343/280 = 120 - 343/280 = -223/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-49/40 3/7-98/40 3/14-49/40 3/7-49/80 9/7-49/40 3/21-49/40 15/7-49/40 3/35-49/40 21/7-49/40 3/49-49/40