Add 80/21 and 60/36
1st number: 3 17/21, 2nd number: 1 24/36
80/21 + 60/36 is 115/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
80/21 = 80 × 12/21 × 12 = 960/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
60/36 = 60 × 7/36 × 7 = 420/252 - Add the two like fractions:
960/252 + 420/252 = 960 + 420/252 = 1380/252 - 1380/252 simplified gives 115/21
- So, 80/21 + 60/36 = 115/21
In mixed form: 510/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+60/36 80/21+60/72 80/63+60/36