Add 80/15 and 21/36
1st number: 5 5/15, 2nd number: 21/36
80/15 + 21/36 is 71/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 15 × 12 = 180,
80/15 = 80 × 12/15 × 12 = 960/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Add the two like fractions:
960/180 + 105/180 = 960 + 105/180 = 1065/180 - 1065/180 simplified gives 71/12
- So, 80/15 + 21/36 = 71/12
In mixed form: 511/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15+42/36 80/30+21/36 80/15+21/72 80/15+63/36 80/45+21/36 80/75+21/36