Add 54/72 and 45/18
1st number: 54/72, 2nd number: 2 9/18
54/72 + 45/18 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
54/72 = 54 × 1/72 × 1 = 54/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
45/18 = 45 × 4/18 × 4 = 180/72 - Add the two like fractions:
54/72 + 180/72 = 54 + 180/72 = 234/72 - 234/72 simplified gives 13/4
- So, 54/72 + 45/18 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/72+90/18 54/72+45/36 54/72+45/54 54/72+45/90