Subtract 21/49 from 81/2
1st number: 40 1/2, 2nd number: 21/49
81/2 - 21/49 is 561/14.
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,
81/2 = 81 × 49/2 × 49 = 3969/98 - Likewise, for the 2nd fraction, since 49 × 2 = 98,
21/49 = 21 × 2/49 × 2 = 42/98 - Subtract the two like fractions:
3969/98 - 42/98 = 3969 - 42/98 = 3927/98 - After reducing the fraction, the answer is 561/14
- In mixed form: 401/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-42/49 81/4-21/49 81/2-21/98 81/2-63/49 81/6-21/49 81/10-21/49 81/14-21/49