Add 63/42 and 36/20
1st number: 1 21/42, 2nd number: 1 16/20
63/42 + 36/20 is 33/10.
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,
63/42 = 63 × 10/42 × 10 = 630/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
36/20 = 36 × 21/20 × 21 = 756/420 - Add the two like fractions:
630/420 + 756/420 = 630 + 756/420 = 1386/420 - 1386/420 simplified gives 33/10
- So, 63/42 + 36/20 = 33/10
In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42+72/20 63/84+36/20 63/42+36/40 63/42+36/60