Add 4/12 and 20/45
4/12 + 20/45 is 7/9.
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,
4/12 = 4 × 15/12 × 15 = 60/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
60/180 + 80/180 = 60 + 80/180 = 140/180 - 140/180 simplified gives 7/9
- So, 4/12 + 20/45 = 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12+20/45 4/12+40/45 4/24+20/45 4/12+20/90 4/12+60/45 4/36+20/45 20/12+20/45 4/60+20/45 28/12+20/45 4/84+20/45