Add 20/21 and 90/98
20/21 + 90/98 is 275/147.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 98 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 21 × 14 = 294,
20/21 = 20 × 14/21 × 14 = 280/294 - Likewise, for the 2nd fraction, since 98 × 3 = 294,
90/98 = 90 × 3/98 × 3 = 270/294 - Add the two like fractions:
280/294 + 270/294 = 280 + 270/294 = 550/294 - 550/294 simplified gives 275/147
- So, 20/21 + 90/98 = 275/147
In mixed form: 1128/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+90/98 20/42+90/98 60/21+90/98 20/63+90/98