Add 81/30 and 28/10
1st number: 2 21/30, 2nd number: 2 8/10
81/30 + 28/10 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
81/30 = 81 × 1/30 × 1 = 81/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
28/10 = 28 × 3/10 × 3 = 84/30 - Add the two like fractions:
81/30 + 84/30 = 81 + 84/30 = 165/30 - 165/30 simplified gives 11/2
- So, 81/30 + 28/10 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+56/10 81/60+28/10 81/30+28/20 81/30+84/10 81/90+28/10 81/30+28/30 81/30+28/50 81/30+28/70