Add 20/12 and 12/45
1st number: 1 8/12, 2nd number: 12/45
20/12 + 12/45 is 29/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
20/12 = 20 × 15/12 × 15 = 300/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
12/45 = 12 × 4/45 × 4 = 48/180 - Add the two like fractions:
300/180 + 48/180 = 300 + 48/180 = 348/180 - 348/180 simplified gives 29/15
- So, 20/12 + 12/45 = 29/15
In mixed form: 114/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12+12/45 20/12+24/45 20/24+12/45 20/12+12/90 60/12+12/45 20/12+36/45 20/36+12/45 20/12+60/45 20/60+12/45 20/12+84/45 20/84+12/45