Add 21/12 and 36/5
1st number: 1 9/12, 2nd number: 7 1/5
21/12 + 36/5 is 179/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
36/5 = 36 × 12/5 × 12 = 432/60 - Add the two like fractions:
105/60 + 432/60 = 105 + 432/60 = 537/60 - 537/60 simplified gives 179/20
- So, 21/12 + 36/5 = 179/20
In mixed form: 819/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+36/5 21/12+72/5 21/24+36/5 21/12+36/10 63/12+36/5 21/36+36/5 21/12+36/15 21/60+36/5 21/12+36/25 21/84+36/5 21/12+36/35