Add 72/18 and 2/5
1st number: 4 0/18, 2nd number: 2/5
72/18 + 2/5 is 22/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
2/5 = 2 × 18/5 × 18 = 36/90 - Add the two like fractions:
360/90 + 36/90 = 360 + 36/90 = 396/90 - 396/90 simplified gives 22/5
- So, 72/18 + 2/5 = 22/5
In mixed form: 42/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+4/5 72/36+2/5 72/18+2/10 72/18+6/5 72/54+2/5 72/18+2/15 72/18+10/5 72/90+2/5 72/18+2/25 72/18+14/5 72/18+2/35