Subtract 2/98 from 21/70
21/70 - 2/98 is 137/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
21/70 = 21 × 7/70 × 7 = 147/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
2/98 = 2 × 5/98 × 5 = 10/490 - Subtract the two like fractions:
147/490 - 10/490 = 147 - 10/490 = 137/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-2/98 21/70-4/98 63/70-2/98 21/70-6/98 21/70-10/98 21/70-14/98