Add 25/21 and 21/70
1st number: 1 4/21, 2nd number: 21/70
25/21 + 21/70 is 313/210.
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,
25/21 = 25 × 10/21 × 10 = 250/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
250/210 + 63/210 = 250 + 63/210 = 313/210 - So, 25/21 + 21/70 = 313/210
In mixed form: 1103/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+21/70 25/21+42/70 25/42+21/70 75/21+21/70 25/21+63/70 25/63+21/70