Subtract 1/21 from 2/70
2/70 - 1/21 is -2/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
2/70 = 2 × 3/70 × 3 = 6/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
1/21 = 1 × 10/21 × 10 = 10/210 - Subtract the two like fractions:
6/210 - 10/210 = 6 - 10/210 = -4/210 - After reducing the fraction, the answer is -2/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/70-1/21 2/70-2/21 2/70-1/42 6/70-1/21 2/70-3/21 2/70-1/63 10/70-1/21 2/70-5/21 14/70-1/21 2/70-7/21