Add 30/21 and 70/36
1st number: 1 9/21, 2nd number: 1 34/36
30/21 + 70/36 is 425/126.
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,
30/21 = 30 × 12/21 × 12 = 360/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252 - Add the two like fractions:
360/252 + 490/252 = 360 + 490/252 = 850/252 - 850/252 simplified gives 425/126
- So, 30/21 + 70/36 = 425/126
In mixed form: 347/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+70/36 30/42+70/36 30/21+70/72 90/21+70/36 30/63+70/36