Add 81/30 and 81/36
1st number: 2 21/30, 2nd number: 2 9/36
81/30 + 81/36 is 99/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
81/30 = 81 × 6/30 × 6 = 486/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
81/36 = 81 × 5/36 × 5 = 405/180 - Add the two like fractions:
486/180 + 405/180 = 486 + 405/180 = 891/180 - 891/180 simplified gives 99/20
- So, 81/30 + 81/36 = 99/20
In mixed form: 419/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+81/36 81/30+81/72 81/90+81/36