Add 81/28 and 10/30
1st number: 2 25/28, 2nd number: 10/30
81/28 + 10/30 is 271/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
10/30 = 10 × 14/30 × 14 = 140/420 - Add the two like fractions:
1215/420 + 140/420 = 1215 + 140/420 = 1355/420 - 1355/420 simplified gives 271/84
- So, 81/28 + 10/30 = 271/84
In mixed form: 319/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28+20/30 81/56+10/30 81/28+10/60 81/84+10/30 81/28+10/90 81/28+50/30 81/28+70/30