Add 18/15 and 20/4
1st number: 1 3/15, 2nd number: 5 0/4
18/15 + 20/4 is 31/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
20/4 = 20 × 15/4 × 15 = 300/60 - Add the two like fractions:
72/60 + 300/60 = 72 + 300/60 = 372/60 - 372/60 simplified gives 31/5
- So, 18/15 + 20/4 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+20/4 18/15+40/4 18/30+20/4 18/15+20/8 54/15+20/4 18/15+60/4 18/45+20/4 18/15+20/12 90/15+20/4 18/75+20/4 18/15+20/28