Add 63/12 and 81/45
1st number: 5 3/12, 2nd number: 1 36/45
63/12 + 81/45 is 141/20.
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,
63/12 = 63 × 15/12 × 15 = 945/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
81/45 = 81 × 4/45 × 4 = 324/180 - Add the two like fractions:
945/180 + 324/180 = 945 + 324/180 = 1269/180 - 1269/180 simplified gives 141/20
- So, 63/12 + 81/45 = 141/20
In mixed form: 71/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/24+81/45 63/12+81/90 63/36+81/45 63/60+81/45 63/84+81/45