Add 21/98 and 81/63
1st number: 21/98, 2nd number: 1 18/63
21/98 + 81/63 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 63 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 98 × 9 = 882,
21/98 = 21 × 9/98 × 9 = 189/882 - Likewise, for the 2nd fraction, since 63 × 14 = 882,
81/63 = 81 × 14/63 × 14 = 1134/882 - Add the two like fractions:
189/882 + 1134/882 = 189 + 1134/882 = 1323/882 - 1323/882 simplified gives 3/2
- So, 21/98 + 81/63 = 3/2
In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+81/63 63/98+81/63