Add 18/30 and 81/60
1st number: 18/30, 2nd number: 1 21/60
18/30 + 81/60 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
18/30 = 18 × 2/30 × 2 = 36/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Add the two like fractions:
36/60 + 81/60 = 36 + 81/60 = 117/60 - 117/60 simplified gives 39/20
- So, 18/30 + 81/60 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+81/60 18/60+81/60 54/30+81/60 18/90+81/60 90/30+81/60