Add 70/21 and 84/49
1st number: 3 7/21, 2nd number: 1 35/49
70/21 + 84/49 is 106/21.
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,
70/21 = 70 × 7/21 × 7 = 490/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
84/49 = 84 × 3/49 × 3 = 252/147 - Add the two like fractions:
490/147 + 252/147 = 490 + 252/147 = 742/147 - 742/147 simplified gives 106/21
- So, 70/21 + 84/49 = 106/21
In mixed form: 51/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+84/49 70/21+84/98 70/63+84/49