Add 98/12 and 5/21
1st number: 8 2/12, 2nd number: 5/21
98/12 + 5/21 is 353/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
98/12 = 98 × 7/12 × 7 = 686/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Add the two like fractions:
686/84 + 20/84 = 686 + 20/84 = 706/84 - 706/84 simplified gives 353/42
- So, 98/12 + 5/21 = 353/42
In mixed form: 817/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/12+10/21 98/24+5/21 98/12+5/42 98/12+15/21 98/36+5/21 98/12+5/63 98/12+25/21 98/60+5/21 98/12+35/21 98/84+5/21