Add 18/28 and 36/30
1st number: 18/28, 2nd number: 1 6/30
18/28 + 36/30 is 129/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
18/28 = 18 × 15/28 × 15 = 270/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
36/30 = 36 × 14/30 × 14 = 504/420 - Add the two like fractions:
270/420 + 504/420 = 270 + 504/420 = 774/420 - 774/420 simplified gives 129/70
- So, 18/28 + 36/30 = 129/70
In mixed form: 159/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+36/30 18/28+72/30 18/56+36/30 18/28+36/60 54/28+36/30 18/84+36/30 18/28+36/90 90/28+36/30