Add 21/75 and 15/18
21/75 + 15/18 is 167/150.
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,
21/75 = 21 × 6/75 × 6 = 126/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
15/18 = 15 × 25/18 × 25 = 375/450 - Add the two like fractions:
126/450 + 375/450 = 126 + 375/450 = 501/450 - 501/450 simplified gives 167/150
- So, 21/75 + 15/18 = 167/150
In mixed form: 117/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75+15/18 21/75+30/18 21/75+15/36 63/75+15/18 21/75+45/18 21/75+15/54 21/75+75/18 21/75+15/90