Subtract 1/98 from 21/70
21/70 - 1/98 is 71/245.
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,
1/98 = 1 × 5/98 × 5 = 5/490 - Subtract the two like fractions:
147/490 - 5/490 = 147 - 5/490 = 142/490 - After reducing the fraction, the answer is 71/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-1/98 21/70-2/98 63/70-1/98 21/70-3/98 21/70-5/98 21/70-7/98