Add 60/40 and 28/72
1st number: 1 20/40, 2nd number: 28/72
60/40 + 28/72 is 17/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
60/40 = 60 × 9/40 × 9 = 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, 60/40 + 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: 60/40+56/72 60/80+28/72 60/40+84/72