Add 18/9 and 9/40
1st number: 2 0/9, 2nd number: 9/40
18/9 + 9/40 is 89/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
18/9 = 18 × 40/9 × 40 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Add the two like fractions:
720/360 + 81/360 = 720 + 81/360 = 801/360 - 801/360 simplified gives 89/40
- So, 18/9 + 9/40 = 89/40
In mixed form: 29/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9+9/40 18/9+18/40 18/9+9/80 54/9+9/40 18/9+27/40 18/27+9/40 90/9+9/40 18/9+45/40 18/45+9/40 18/9+63/40 18/63+9/40