Add 20/28 and 7/15
20/28 + 7/15 is 124/105.
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,
20/28 = 20 × 15/28 × 15 = 300/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
7/15 = 7 × 28/15 × 28 = 196/420 - Add the two like fractions:
300/420 + 196/420 = 300 + 196/420 = 496/420 - 496/420 simplified gives 124/105
- So, 20/28 + 7/15 = 124/105
In mixed form: 119/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+7/15 20/28+14/15 20/56+7/15 20/28+7/30 60/28+7/15 20/28+21/15 20/84+7/15 20/28+7/45 20/28+35/15 20/28+7/75 20/28+49/15