Add 21/63 and 16/7
1st number: 21/63, 2nd number: 2 2/7
21/63 + 16/7 is 55/21.
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,
16/7 = 16 × 9/7 × 9 = 144/63 - Add the two like fractions:
21/63 + 144/63 = 21 + 144/63 = 165/63 - 165/63 simplified gives 55/21
- So, 21/63 + 16/7 = 55/21
In mixed form: 213/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+16/7 21/63+32/7 21/63+16/14 21/63+48/7 21/63+16/21 21/63+80/7 21/63+16/35 21/63+16/49