Add 81/30 and 14/28
1st number: 2 21/30, 2nd number: 14/28
81/30 + 14/28 is 16/5.
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,
14/28 = 14 × 15/28 × 15 = 210/420 - Add the two like fractions:
1134/420 + 210/420 = 1134 + 210/420 = 1344/420 - 1344/420 simplified gives 16/5
- So, 81/30 + 14/28 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+14/28 81/30+14/56 81/30+42/28 81/90+14/28 81/30+14/84 81/30+70/28 81/30+98/28