Add 4/42 and 21/36
4/42 + 21/36 is 19/28.
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,
4/42 = 4 × 6/42 × 6 = 24/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Add the two like fractions:
24/252 + 147/252 = 24 + 147/252 = 171/252 - 171/252 simplified gives 19/28
- So, 4/42 + 21/36 = 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42+21/36 4/42+42/36 4/84+21/36 4/42+21/72 12/42+21/36 4/42+63/36 20/42+21/36 28/42+21/36