Subtract 49/21 from 35/42
1st number: 35/42, 2nd number: 2 7/21
35/42 - 49/21 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
35/42 = 35 × 1/42 × 1 = 35/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
49/21 = 49 × 2/21 × 2 = 98/42 - Subtract the two like fractions:
35/42 - 98/42 = 35 - 98/42 = -63/42 - After reducing the fraction, the answer is -3/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-49/21 35/42-98/21 35/84-49/21 35/42-49/42 35/42-49/63