Add 2/21 and 21/70
2/21 + 21/70 is 83/210.
Steps for adding 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,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
20/210 + 63/210 = 20 + 63/210 = 83/210 - So, 2/21 + 21/70 = 83/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+21/70 2/21+42/70 2/42+21/70 6/21+21/70 2/21+63/70 2/63+21/70 10/21+21/70 14/21+21/70