Add 18/5 and 72/18
1st number: 3 3/5, 2nd number: 4 0/18
18/5 + 72/18 is 38/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
18/5 = 18 × 18/5 × 18 = 324/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Add the two like fractions:
324/90 + 360/90 = 324 + 360/90 = 684/90 - 684/90 simplified gives 38/5
- So, 18/5 + 72/18 = 38/5
In mixed form: 73/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5+72/18 18/10+72/18 18/5+72/36 54/5+72/18 18/15+72/18 18/5+72/54 90/5+72/18 18/25+72/18 18/5+72/90 18/35+72/18