Add 3/30 and 81/28
1st number: 3/30, 2nd number: 2 25/28
3/30 + 81/28 is 419/140.
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,
3/30 = 3 × 14/30 × 14 = 42/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Add the two like fractions:
42/420 + 1215/420 = 42 + 1215/420 = 1257/420 - 1257/420 simplified gives 419/140
- So, 3/30 + 81/28 = 419/140
In mixed form: 2139/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/30+81/28 3/60+81/28 3/30+81/56 9/30+81/28 3/90+81/28 3/30+81/84 15/30+81/28 21/30+81/28