Add 3/12 and 27/45
3/12 + 27/45 is 17/20.
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,
3/12 = 3 × 15/12 × 15 = 45/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
27/45 = 27 × 4/45 × 4 = 108/180 - Add the two like fractions:
45/180 + 108/180 = 45 + 108/180 = 153/180 - 153/180 simplified gives 17/20
- So, 3/12 + 27/45 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+27/45 3/12+54/45 3/24+27/45 3/12+27/90 9/12+27/45 3/12+81/45 3/36+27/45 15/12+27/45 3/60+27/45 21/12+27/45 3/84+27/45