Add 81/30 and 12/36
1st number: 2 21/30, 2nd number: 12/36
81/30 + 12/36 is 91/30.
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,
12/36 = 12 × 5/36 × 5 = 60/180 - Add the two like fractions:
486/180 + 60/180 = 486 + 60/180 = 546/180 - 546/180 simplified gives 91/30
- So, 81/30 + 12/36 = 91/30
In mixed form: 31/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+24/36 81/60+12/36 81/30+12/72 81/90+12/36 81/30+60/36 81/30+84/36