Add 4/36 and 70/21
1st number: 4/36, 2nd number: 3 7/21
4/36 + 70/21 is 31/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
4/36 = 4 × 7/36 × 7 = 28/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
70/21 = 70 × 12/21 × 12 = 840/252 - Add the two like fractions:
28/252 + 840/252 = 28 + 840/252 = 868/252 - 868/252 simplified gives 31/9
- So, 4/36 + 70/21 = 31/9
In mixed form: 34/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/36+70/21 4/72+70/21 4/36+70/42 12/36+70/21 4/36+70/63 20/36+70/21 28/36+70/21