Add 40/12 and 21/27
1st number: 3 4/12, 2nd number: 21/27
40/12 + 21/27 is 37/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
40/12 = 40 × 9/12 × 9 = 360/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
21/27 = 21 × 4/27 × 4 = 84/108 - Add the two like fractions:
360/108 + 84/108 = 360 + 84/108 = 444/108 - 444/108 simplified gives 37/9
- So, 40/12 + 21/27 = 37/9
In mixed form: 41/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12+21/27 40/12+42/27 40/24+21/27 40/12+21/54 40/12+63/27 40/36+21/27 40/12+21/81 40/60+21/27 40/84+21/27