Add 15/54 and 90/72
1st number: 15/54, 2nd number: 1 18/72
15/54 + 90/72 is 55/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 72 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 54 × 4 = 216,
15/54 = 15 × 4/54 × 4 = 60/216 - Likewise, for the 2nd fraction, since 72 × 3 = 216,
90/72 = 90 × 3/72 × 3 = 270/216 - Add the two like fractions:
60/216 + 270/216 = 60 + 270/216 = 330/216 - 330/216 simplified gives 55/36
- So, 15/54 + 90/72 = 55/36
In mixed form: 119/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/54+90/72 45/54+90/72 75/54+90/72