Add 18/75 and 21/18
1st number: 18/75, 2nd number: 1 3/18
18/75 + 21/18 is 211/150.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
18/75 = 18 × 6/75 × 6 = 108/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Add the two like fractions:
108/450 + 525/450 = 108 + 525/450 = 633/450 - 633/450 simplified gives 211/150
- So, 18/75 + 21/18 = 211/150
In mixed form: 161/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/75+21/18 18/75+42/18 18/75+21/36 54/75+21/18 18/75+63/18 18/75+21/54 90/75+21/18 18/75+21/90