Add 20/15 and 7/72
1st number: 1 5/15, 2nd number: 7/72
20/15 + 7/72 is 103/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
20/15 = 20 × 24/15 × 24 = 480/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
7/72 = 7 × 5/72 × 5 = 35/360 - Add the two like fractions:
480/360 + 35/360 = 480 + 35/360 = 515/360 - 515/360 simplified gives 103/72
- So, 20/15 + 7/72 = 103/72
In mixed form: 131/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+7/72 20/15+14/72 20/30+7/72 60/15+7/72 20/15+21/72 20/45+7/72 20/15+35/72 20/75+7/72 20/15+49/72