Add 12/36 and 2/21
12/36 + 2/21 is 3/7.
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,
12/36 = 12 × 7/36 × 7 = 84/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
2/21 = 2 × 12/21 × 12 = 24/252 - Add the two like fractions:
84/252 + 24/252 = 84 + 24/252 = 108/252 - 108/252 simplified gives 3/7
- So, 12/36 + 2/21 = 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/36+2/21 12/36+4/21 12/72+2/21 12/36+2/42 12/36+6/21 12/36+2/63 60/36+2/21 12/36+10/21 84/36+2/21 12/36+14/21