Add 84/12 and 48/21
1st number: 7 0/12, 2nd number: 2 6/21
84/12 + 48/21 is 65/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
84/12 = 84 × 7/12 × 7 = 588/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
48/21 = 48 × 4/21 × 4 = 192/84 - Add the two like fractions:
588/84 + 192/84 = 588 + 192/84 = 780/84 - 780/84 simplified gives 65/7
- So, 84/12 + 48/21 = 65/7
In mixed form: 92/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+96/21 84/24+48/21 84/12+48/42 84/36+48/21 84/12+48/63 84/60+48/21