Add 21/63 and 6/7
21/63 + 6/7 is 25/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
6/7 = 6 × 9/7 × 9 = 54/63 - Add the two like fractions:
21/63 + 54/63 = 21 + 54/63 = 75/63 - 75/63 simplified gives 25/21
- So, 21/63 + 6/7 = 25/21
In mixed form: 14/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+6/7 21/63+12/7 21/63+6/14 21/63+18/7 21/63+6/21 21/63+30/7 21/63+6/35 21/63+42/7 21/63+6/49