Add 54/15 and 21/36
1st number: 3 9/15, 2nd number: 21/36
54/15 + 21/36 is 251/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 15 × 12 = 180,
54/15 = 54 × 12/15 × 12 = 648/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Add the two like fractions:
648/180 + 105/180 = 648 + 105/180 = 753/180 - 753/180 simplified gives 251/60
- So, 54/15 + 21/36 = 251/60
In mixed form: 411/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+42/36 54/30+21/36 54/15+21/72 54/15+63/36 54/45+21/36 54/75+21/36