Add 5/42 and 18/36
5/42 + 18/36 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
5/42 = 5 × 6/42 × 6 = 30/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Add the two like fractions:
30/252 + 126/252 = 30 + 126/252 = 156/252 - 156/252 simplified gives 13/21
- So, 5/42 + 18/36 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+18/36 5/84+18/36 5/42+18/72 15/42+18/36 5/42+54/36 25/42+18/36 5/42+90/36 35/42+18/36