Add 5/21 and 98/18
1st number: 5/21, 2nd number: 5 8/18
5/21 + 98/18 is 358/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
5/21 = 5 × 6/21 × 6 = 30/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
98/18 = 98 × 7/18 × 7 = 686/126 - Add the two like fractions:
30/126 + 686/126 = 30 + 686/126 = 716/126 - 716/126 simplified gives 358/63
- So, 5/21 + 98/18 = 358/63
In mixed form: 543/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+98/18 5/42+98/18 5/21+98/36 15/21+98/18 5/63+98/18 5/21+98/54 25/21+98/18 5/21+98/90 35/21+98/18