Add 20/28 and 18/36
20/28 + 18/36 is 17/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Add the two like fractions:
180/252 + 126/252 = 180 + 126/252 = 306/252 - 306/252 simplified gives 17/14
- So, 20/28 + 18/36 = 17/14
In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+18/36 20/56+18/36 20/28+18/72 60/28+18/36 20/28+54/36 20/84+18/36 20/28+90/36