Add 45/7 and 21/9
1st number: 6 3/7, 2nd number: 2 3/9
45/7 + 21/9 is 184/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
45/7 = 45 × 9/7 × 9 = 405/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Add the two like fractions:
405/63 + 147/63 = 405 + 147/63 = 552/63 - 552/63 simplified gives 184/21
- So, 45/7 + 21/9 = 184/21
In mixed form: 816/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+21/9 45/7+42/9 45/14+21/9 45/7+21/18 45/7+63/9 45/21+21/9 45/7+21/27 45/35+21/9 45/7+21/45 45/49+21/9 45/7+21/63