Add 18/28 and 28/30
18/28 + 28/30 is 331/210.
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,
28/30 = 28 × 14/30 × 14 = 392/420 - Add the two like fractions:
270/420 + 392/420 = 270 + 392/420 = 662/420 - 662/420 simplified gives 331/210
- So, 18/28 + 28/30 = 331/210
In mixed form: 1121/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+28/30 18/28+56/30 18/56+28/30 18/28+28/60 54/28+28/30 18/28+84/30 18/84+28/30 18/28+28/90 90/28+28/30