Add 20/15 and 30/72
1st number: 1 5/15, 2nd number: 30/72
20/15 + 30/72 is 7/4.
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,
30/72 = 30 × 5/72 × 5 = 150/360 - Add the two like fractions:
480/360 + 150/360 = 480 + 150/360 = 630/360 - 630/360 simplified gives 7/4
- So, 20/15 + 30/72 = 7/4
In mixed form: 13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+30/72 20/15+60/72 20/30+30/72 60/15+30/72 20/15+90/72 20/45+30/72 20/75+30/72