Add 81/30 and 30/28
1st number: 2 21/30, 2nd number: 1 2/28
81/30 + 30/28 is 132/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
81/30 = 81 × 14/30 × 14 = 1134/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
30/28 = 30 × 15/28 × 15 = 450/420 - Add the two like fractions:
1134/420 + 450/420 = 1134 + 450/420 = 1584/420 - 1584/420 simplified gives 132/35
- So, 81/30 + 30/28 = 132/35
In mixed form: 327/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+60/28 81/60+30/28 81/30+30/56 81/30+90/28 81/90+30/28 81/30+30/84