Add 27/63 and 20/12
1st number: 27/63, 2nd number: 1 8/12
27/63 + 20/12 is 44/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
27/63 = 27 × 4/63 × 4 = 108/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
20/12 = 20 × 21/12 × 21 = 420/252 - Add the two like fractions:
108/252 + 420/252 = 108 + 420/252 = 528/252 - 528/252 simplified gives 44/21
- So, 27/63 + 20/12 = 44/21
In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+20/12 27/63+40/12 27/63+20/24 81/63+20/12 27/63+60/12 27/63+20/36 27/63+20/60 27/63+20/84