Add 9/21 and 70/49
1st number: 9/21, 2nd number: 1 21/49
9/21 + 70/49 is 13/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
9/21 = 9 × 7/21 × 7 = 63/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
70/49 = 70 × 3/49 × 3 = 210/147 - Add the two like fractions:
63/147 + 210/147 = 63 + 210/147 = 273/147 - 273/147 simplified gives 13/7
- So, 9/21 + 70/49 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+70/49 9/42+70/49 9/21+70/98 27/21+70/49 9/63+70/49 45/21+70/49 63/21+70/49