Add 42/36 and 63/21
1st number: 1 6/36, 2nd number: 3 0/21
42/36 + 63/21 is 25/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
42/36 = 42 × 7/36 × 7 = 294/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
63/21 = 63 × 12/21 × 12 = 756/252 - Add the two like fractions:
294/252 + 756/252 = 294 + 756/252 = 1050/252 - 1050/252 simplified gives 25/6
- So, 42/36 + 63/21 = 25/6
In mixed form: 41/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36+63/21 42/72+63/21 42/36+63/42