Add 35/42 and 18/20
35/42 + 18/20 is 26/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
35/42 = 35 × 10/42 × 10 = 350/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
18/20 = 18 × 21/20 × 21 = 378/420 - Add the two like fractions:
350/420 + 378/420 = 350 + 378/420 = 728/420 - 728/420 simplified gives 26/15
- So, 35/42 + 18/20 = 26/15
In mixed form: 111/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+18/20 35/42+36/20 35/84+18/20 35/42+18/40 35/42+54/20 35/42+18/60 35/42+90/20