Add 30/45 and 28/72
30/45 + 28/72 is 19/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
30/45 = 30 × 8/45 × 8 = 240/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Add the two like fractions:
240/360 + 140/360 = 240 + 140/360 = 380/360 - 380/360 simplified gives 19/18
- So, 30/45 + 28/72 = 19/18
In mixed form: 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45+28/72 30/45+56/72 30/90+28/72 90/45+28/72 30/45+84/72