Subtract 6/49 from 42/21
1st number: 2 0/21, 2nd number: 6/49
42/21 - 6/49 is 92/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
42/21 = 42 × 7/21 × 7 = 294/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
6/49 = 6 × 3/49 × 3 = 18/147 - Subtract the two like fractions:
294/147 - 18/147 = 294 - 18/147 = 276/147 - After reducing the fraction, the answer is 92/49
- In mixed form: 143/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-6/49 42/21-12/49 42/21-6/98 42/21-18/49 42/63-6/49 42/21-30/49 42/21-42/49