Add 45/30 and 28/72
1st number: 1 15/30, 2nd number: 28/72
45/30 + 28/72 is 17/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
45/30 = 45 × 12/30 × 12 = 540/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Add the two like fractions:
540/360 + 140/360 = 540 + 140/360 = 680/360 - 680/360 simplified gives 17/9
- So, 45/30 + 28/72 = 17/9
In mixed form: 18/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+28/72 45/30+56/72 45/60+28/72 45/30+84/72 45/90+28/72