Add 72/18 and 7/30
1st number: 4 0/18, 2nd number: 7/30
72/18 + 7/30 is 127/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 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 30 × 3 = 90,
7/30 = 7 × 3/30 × 3 = 21/90 - Add the two like fractions:
360/90 + 21/90 = 360 + 21/90 = 381/90 - 381/90 simplified gives 127/30
- So, 72/18 + 7/30 = 127/30
In mixed form: 47/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+14/30 72/36+7/30 72/18+7/60 72/18+21/30 72/54+7/30 72/18+7/90 72/18+35/30 72/90+7/30 72/18+49/30