Add 45/12 and 63/7
1st number: 3 9/12, 2nd number: 9 0/7
45/12 + 63/7 is 51/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
63/7 = 63 × 12/7 × 12 = 756/84 - Add the two like fractions:
315/84 + 756/84 = 315 + 756/84 = 1071/84 - 1071/84 simplified gives 51/4
- So, 45/12 + 63/7 = 51/4
In mixed form: 123/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+63/7 45/24+63/7 45/12+63/14 45/36+63/7 45/12+63/21 45/60+63/7 45/12+63/35 45/84+63/7 45/12+63/49