Subtract 24/49 from 21/42
21/42 - 24/49 is 1/98.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 49 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 42 × 7 = 294,
21/42 = 21 × 7/42 × 7 = 147/294 - Likewise, for the 2nd fraction, since 49 × 6 = 294,
24/49 = 24 × 6/49 × 6 = 144/294 - Subtract the two like fractions:
147/294 - 144/294 = 147 - 144/294 = 3/294 - After reducing the fraction, the answer is 1/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42-48/49 21/84-24/49 21/42-24/98 63/42-24/49 21/42-72/49