Add 15/28 and 80/15
1st number: 15/28, 2nd number: 5 5/15
15/28 + 80/15 is 493/84.
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,
15/28 = 15 × 15/28 × 15 = 225/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
80/15 = 80 × 28/15 × 28 = 2240/420 - Add the two like fractions:
225/420 + 2240/420 = 225 + 2240/420 = 2465/420 - 2465/420 simplified gives 493/84
- So, 15/28 + 80/15 = 493/84
In mixed form: 573/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+80/15 15/56+80/15 15/28+80/30 45/28+80/15 15/84+80/15 15/28+80/45 75/28+80/15 15/28+80/75