Add 80/15 and 18/20
1st number: 5 5/15, 2nd number: 18/20
80/15 + 18/20 is 187/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
80/15 = 80 × 4/15 × 4 = 320/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Add the two like fractions:
320/60 + 54/60 = 320 + 54/60 = 374/60 - 374/60 simplified gives 187/30
- So, 80/15 + 18/20 = 187/30
In mixed form: 67/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15+36/20 80/30+18/20 80/15+18/40 80/15+54/20 80/45+18/20 80/15+18/60 80/15+90/20 80/75+18/20