Add 49/21 and 90/20
1st number: 2 7/21, 2nd number: 4 10/20
49/21 + 90/20 is 41/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
49/21 = 49 × 20/21 × 20 = 980/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
90/20 = 90 × 21/20 × 21 = 1890/420 - Add the two like fractions:
980/420 + 1890/420 = 980 + 1890/420 = 2870/420 - 2870/420 simplified gives 41/6
- So, 49/21 + 90/20 = 41/6
In mixed form: 65/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21+90/20 49/42+90/20 49/21+90/40 49/63+90/20 49/21+90/60