Add 28/40 and 27/45
28/40 + 27/45 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 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 45 × 8 = 360,
27/45 = 27 × 8/45 × 8 = 216/360 - Add the two like fractions:
252/360 + 216/360 = 252 + 216/360 = 468/360 - 468/360 simplified gives 13/10
- So, 28/40 + 27/45 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+27/45 28/40+54/45 28/80+27/45 28/40+27/90 84/40+27/45 28/40+81/45