Add 21/98 and 84/81
1st number: 21/98, 2nd number: 1 3/81
21/98 + 84/81 is 473/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 81 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 98 × 81 = 7938,
21/98 = 21 × 81/98 × 81 = 1701/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
84/81 = 84 × 98/81 × 98 = 8232/7938 - Add the two like fractions:
1701/7938 + 8232/7938 = 1701 + 8232/7938 = 9933/7938 - 9933/7938 simplified gives 473/378
- So, 21/98 + 84/81 = 473/378
In mixed form: 195/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+84/81 63/98+84/81