Add 45/7 and 21/63
1st number: 6 3/7, 2nd number: 21/63
45/7 + 21/63 is 142/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 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 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Add the two like fractions:
405/63 + 21/63 = 405 + 21/63 = 426/63 - 426/63 simplified gives 142/21
- So, 45/7 + 21/63 = 142/21
In mixed form: 616/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+21/63 45/7+42/63 45/14+21/63 45/21+21/63 45/35+21/63 45/49+21/63