Add 28/21 and 70/36
1st number: 1 7/21, 2nd number: 1 34/36
28/21 + 70/36 is 59/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
28/21 = 28 × 12/21 × 12 = 336/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252 - Add the two like fractions:
336/252 + 490/252 = 336 + 490/252 = 826/252 - 826/252 simplified gives 59/18
- So, 28/21 + 70/36 = 59/18
In mixed form: 35/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+70/36 28/42+70/36 28/21+70/72 84/21+70/36 28/63+70/36