Add 3/15 and 20/28
3/15 + 20/28 is 32/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
3/15 = 3 × 28/15 × 28 = 84/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
20/28 = 20 × 15/28 × 15 = 300/420 - Add the two like fractions:
84/420 + 300/420 = 84 + 300/420 = 384/420 - 384/420 simplified gives 32/35
- So, 3/15 + 20/28 = 32/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+20/28 3/15+40/28 3/30+20/28 3/15+20/56 9/15+20/28 3/15+60/28 3/45+20/28 3/15+20/84 3/75+20/28 21/15+20/28