Subtract 42/49 from 21/2
1st number: 10 1/2, 2nd number: 42/49
21/2 - 42/49 is 135/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 49 is 98
Next, find the equivalent fraction of both fractional numbers with denominator 98 - For the 1st fraction, since 2 × 49 = 98,
21/2 = 21 × 49/2 × 49 = 1029/98 - Likewise, for the 2nd fraction, since 49 × 2 = 98,
42/49 = 42 × 2/49 × 2 = 84/98 - Subtract the two like fractions:
1029/98 - 84/98 = 1029 - 84/98 = 945/98 - After reducing the fraction, the answer is 135/14
- In mixed form: 99/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-42/49 21/2-84/49 21/4-42/49 21/2-42/98 63/2-42/49 21/6-42/49 21/10-42/49 21/14-42/49