Add 21/36 and 35/7
1st number: 21/36, 2nd number: 5 0/7
21/36 + 35/7 is 67/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
35/7 = 35 × 36/7 × 36 = 1260/252 - Add the two like fractions:
147/252 + 1260/252 = 147 + 1260/252 = 1407/252 - 1407/252 simplified gives 67/12
- So, 21/36 + 35/7 = 67/12
In mixed form: 57/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+35/7 21/36+70/7 21/72+35/7 21/36+35/14 63/36+35/7 21/36+35/21 21/36+35/49