Add 81/28 and 75/15
1st number: 2 25/28, 2nd number: 5 0/15
81/28 + 75/15 is 221/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 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 15 × 28 = 420,
75/15 = 75 × 28/15 × 28 = 2100/420 - Add the two like fractions:
1215/420 + 2100/420 = 1215 + 2100/420 = 3315/420 - 3315/420 simplified gives 221/28
- So, 81/28 + 75/15 = 221/28
In mixed form: 725/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56+75/15 81/28+75/30 81/84+75/15 81/28+75/45