Add 63/45 and 20/12
1st number: 1 18/45, 2nd number: 1 8/12
63/45 + 20/12 is 46/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
63/45 = 63 × 4/45 × 4 = 252/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
20/12 = 20 × 15/12 × 15 = 300/180 - Add the two like fractions:
252/180 + 300/180 = 252 + 300/180 = 552/180 - 552/180 simplified gives 46/15
- So, 63/45 + 20/12 = 46/15
In mixed form: 31/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/45+40/12 63/90+20/12 63/45+20/24 63/45+60/12 63/45+20/36 63/45+20/60 63/45+20/84