Add 27/28 and 20/30
27/28 + 20/30 is 137/84.
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,
27/28 = 27 × 15/28 × 15 = 405/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
20/30 = 20 × 14/30 × 14 = 280/420 - Add the two like fractions:
405/420 + 280/420 = 405 + 280/420 = 685/420 - 685/420 simplified gives 137/84
- So, 27/28 + 20/30 = 137/84
In mixed form: 153/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+20/30 27/28+40/30 27/56+20/30 27/28+20/60 81/28+20/30 27/28+60/30 27/84+20/30 27/28+20/90