Add 90/45 and 28/40
1st number: 2 0/45, 2nd number: 28/40
90/45 + 28/40 is 27/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
90/45 = 90 × 8/45 × 8 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
720/360 + 252/360 = 720 + 252/360 = 972/360 - 972/360 simplified gives 27/10
- So, 90/45 + 28/40 = 27/10
In mixed form: 27/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+56/40 90/45+28/80 90/45+84/40