Add 20/15 and 10/28
1st number: 1 5/15, 2nd number: 10/28
20/15 + 10/28 is 71/42.
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,
20/15 = 20 × 28/15 × 28 = 560/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
10/28 = 10 × 15/28 × 15 = 150/420 - Add the two like fractions:
560/420 + 150/420 = 560 + 150/420 = 710/420 - 710/420 simplified gives 71/42
- So, 20/15 + 10/28 = 71/42
In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+10/28 20/15+20/28 20/30+10/28 20/15+10/56 60/15+10/28 20/15+30/28 20/45+10/28 20/15+10/84 20/15+50/28 20/75+10/28 20/15+70/28