Add 28/40 and 50/90
28/40 + 50/90 is 113/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
50/90 = 50 × 4/90 × 4 = 200/360 - Add the two like fractions:
252/360 + 200/360 = 252 + 200/360 = 452/360 - 452/360 simplified gives 113/90
- So, 28/40 + 50/90 = 113/90
In mixed form: 123/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+50/90 28/80+50/90 84/40+50/90