Subtract 2/70 from 2/21
2/21 - 2/70 is 1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
2/21 = 2 × 10/21 × 10 = 20/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
2/70 = 2 × 3/70 × 3 = 6/210 - Subtract the two like fractions:
20/210 - 6/210 = 20 - 6/210 = 14/210 - After reducing the fraction, the answer is 1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-2/70 2/21-4/70 2/42-2/70 6/21-2/70 2/21-6/70 2/63-2/70 10/21-2/70 2/21-10/70 14/21-2/70 2/21-14/70