Add 54/7 and 84/9
1st number: 7 5/7, 2nd number: 9 3/9
54/7 + 84/9 is 358/21.
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,
54/7 = 54 × 9/7 × 9 = 486/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
84/9 = 84 × 7/9 × 7 = 588/63 - Add the two like fractions:
486/63 + 588/63 = 486 + 588/63 = 1074/63 - 1074/63 simplified gives 358/21
- So, 54/7 + 84/9 = 358/21
In mixed form: 171/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/14+84/9 54/7+84/18 54/21+84/9 54/7+84/27 54/35+84/9 54/7+84/45 54/49+84/9 54/7+84/63