Subtract 8/42 from 21/98
21/98 - 8/42 is 1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 42 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 98 × 3 = 294,
21/98 = 21 × 3/98 × 3 = 63/294 - Likewise, for the 2nd fraction, since 42 × 7 = 294,
8/42 = 8 × 7/42 × 7 = 56/294 - Subtract the two like fractions:
63/294 - 56/294 = 63 - 56/294 = 7/294 - After reducing the fraction, the answer is 1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-8/42 21/98-16/42 21/98-8/84 63/98-8/42 21/98-24/42 21/98-40/42 21/98-56/42