Add 63/9 and 1/21
1st number: 7 0/9, 2nd number: 1/21
63/9 + 1/21 is 148/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
63/9 = 63 × 7/9 × 7 = 441/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
1/21 = 1 × 3/21 × 3 = 3/63 - Add the two like fractions:
441/63 + 3/63 = 441 + 3/63 = 444/63 - 444/63 simplified gives 148/21
- So, 63/9 + 1/21 = 148/21
In mixed form: 71/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/9+2/21 63/18+1/21 63/9+1/42 63/9+3/21 63/27+1/21 63/9+1/63 63/9+5/21 63/45+1/21 63/9+7/21