Add 15/12 and 63/18
1st number: 1 3/12, 2nd number: 3 9/18
15/12 + 63/18 is 19/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
15/12 = 15 × 3/12 × 3 = 45/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
63/18 = 63 × 2/18 × 2 = 126/36 - Add the two like fractions:
45/36 + 126/36 = 45 + 126/36 = 171/36 - 171/36 simplified gives 19/4
- So, 15/12 + 63/18 = 19/4
In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+63/18 15/24+63/18 15/12+63/36 45/12+63/18 15/36+63/18 15/12+63/54 75/12+63/18 15/60+63/18 15/12+63/90 15/84+63/18