Add 63/18 and 81/12
1st number: 3 9/18, 2nd number: 6 9/12
63/18 + 81/12 is 41/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
63/18 = 63 × 2/18 × 2 = 126/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
81/12 = 81 × 3/12 × 3 = 243/36 - Add the two like fractions:
126/36 + 243/36 = 126 + 243/36 = 369/36 - 369/36 simplified gives 41/4
- So, 63/18 + 81/12 = 41/4
In mixed form: 101/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/36+81/12 63/18+81/24 63/54+81/12 63/18+81/36 63/90+81/12 63/18+81/60 63/18+81/84