Subtract 40/14 from 49/21
1st number: 2 7/21, 2nd number: 2 12/14
49/21 - 40/14 is -11/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
49/21 = 49 × 2/21 × 2 = 98/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
40/14 = 40 × 3/14 × 3 = 120/42 - Subtract the two like fractions:
98/42 - 120/42 = 98 - 120/42 = -22/42 - After reducing the fraction, the answer is -11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-40/14 49/21-80/14 49/42-40/14 49/21-40/28 49/63-40/14 49/21-40/42 49/21-40/70 49/21-40/98