Add 81/30 and 3/9
1st number: 2 21/30, 2nd number: 3/9
81/30 + 3/9 is 91/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
3/9 = 3 × 10/9 × 10 = 30/90 - Add the two like fractions:
243/90 + 30/90 = 243 + 30/90 = 273/90 - 273/90 simplified gives 91/30
- So, 81/30 + 3/9 = 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+6/9 81/60+3/9 81/30+3/18 81/90+3/9 81/30+3/27 81/30+15/9 81/30+3/45 81/30+21/9 81/30+3/63