Subtract 7/98 from 20/42
20/42 - 7/98 is 17/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 98 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 42 × 7 = 294,
20/42 = 20 × 7/42 × 7 = 140/294 - Likewise, for the 2nd fraction, since 98 × 3 = 294,
7/98 = 7 × 3/98 × 3 = 21/294 - Subtract the two like fractions:
140/294 - 21/294 = 140 - 21/294 = 119/294 - After reducing the fraction, the answer is 17/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-7/98 20/42-14/98 20/84-7/98 60/42-7/98 20/42-21/98 20/42-35/98 20/42-49/98