Subtract 7/70 from 21/98
21/98 - 7/70 is 4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
7/70 = 7 × 7/70 × 7 = 49/490 - Subtract the two like fractions:
105/490 - 49/490 = 105 - 49/490 = 56/490 - After reducing the fraction, the answer is 4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-7/70 21/98-14/70 63/98-7/70 21/98-21/70 21/98-35/70 21/98-49/70