Add 84/12 and 18/72
1st number: 7 0/12, 2nd number: 18/72
84/12 + 18/72 is 29/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
84/12 = 84 × 6/12 × 6 = 504/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72 - Add the two like fractions:
504/72 + 18/72 = 504 + 18/72 = 522/72 - 522/72 simplified gives 29/4
- So, 84/12 + 18/72 = 29/4
In mixed form: 71/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+36/72 84/24+18/72 84/12+54/72 84/36+18/72 84/12+90/72 84/60+18/72