Add 12/63 and 35/21
1st number: 12/63, 2nd number: 1 14/21
12/63 + 35/21 is 13/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
12/63 = 12 × 1/63 × 1 = 12/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
35/21 = 35 × 3/21 × 3 = 105/63 - Add the two like fractions:
12/63 + 105/63 = 12 + 105/63 = 117/63 - 117/63 simplified gives 13/7
- So, 12/63 + 35/21 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63+35/21 12/63+70/21 12/63+35/42 36/63+35/21 12/63+35/63 60/63+35/21 84/63+35/21