Add 21/42 and 8/36
21/42 + 8/36 is 13/18.
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,
21/42 = 21 × 6/42 × 6 = 126/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
8/36 = 8 × 7/36 × 7 = 56/252 - Add the two like fractions:
126/252 + 56/252 = 126 + 56/252 = 182/252 - 182/252 simplified gives 13/18
- So, 21/42 + 8/36 = 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42+16/36 21/84+8/36 21/42+8/72 63/42+8/36 21/42+24/36 21/42+40/36 21/42+56/36