Add 45/12 and 84/7
1st number: 3 9/12, 2nd number: 12 0/7
45/12 + 84/7 is 63/4.
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,
84/7 = 84 × 12/7 × 12 = 1008/84 - Add the two like fractions:
315/84 + 1008/84 = 315 + 1008/84 = 1323/84 - 1323/84 simplified gives 63/4
- So, 45/12 + 84/7 = 63/4
In mixed form: 153/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+84/7 45/24+84/7 45/12+84/14 45/36+84/7 45/12+84/21 45/60+84/7 45/12+84/35 45/84+84/7 45/12+84/49