Add 42/21 and 9/70
1st number: 2 0/21, 2nd number: 9/70
42/21 + 9/70 is 149/70.
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,
42/21 = 42 × 10/21 × 10 = 420/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
9/70 = 9 × 3/70 × 3 = 27/210 - Add the two like fractions:
420/210 + 27/210 = 420 + 27/210 = 447/210 - 447/210 simplified gives 149/70
- So, 42/21 + 9/70 = 149/70
In mixed form: 29/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+9/70 42/21+18/70 42/21+27/70 42/63+9/70 42/21+45/70 42/21+63/70