Add 18/12 and 9/72
1st number: 1 6/12, 2nd number: 9/72
18/12 + 9/72 is 13/8.
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,
18/12 = 18 × 6/12 × 6 = 108/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
9/72 = 9 × 1/72 × 1 = 9/72 - Add the two like fractions:
108/72 + 9/72 = 108 + 9/72 = 117/72 - 117/72 simplified gives 13/8
- So, 18/12 + 9/72 = 13/8
In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12+9/72 18/12+18/72 18/24+9/72 54/12+9/72 18/12+27/72 18/36+9/72 90/12+9/72 18/12+45/72 18/60+9/72 18/12+63/72 18/84+9/72