Add 28/40 and 54/18
1st number: 28/40, 2nd number: 3 0/18
28/40 + 54/18 is 37/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 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 18 × 20 = 360,
54/18 = 54 × 20/18 × 20 = 1080/360 - Add the two like fractions:
252/360 + 1080/360 = 252 + 1080/360 = 1332/360 - 1332/360 simplified gives 37/10
- So, 28/40 + 54/18 = 37/10
In mixed form: 37/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+54/18 28/80+54/18 28/40+54/36 84/40+54/18 28/40+54/90