Add 30/15 and 72/18
1st number: 2 0/15, 2nd number: 4 0/18
30/15 + 72/18 is 6/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
30/15 = 30 × 6/15 × 6 = 180/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Add the two like fractions:
180/90 + 360/90 = 180 + 360/90 = 540/90 - 540/90 simplified gives 6/1
- So, 30/15 + 72/18 = 6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+72/18 30/15+72/36 90/15+72/18 30/45+72/18 30/15+72/54 30/75+72/18 30/15+72/90