Add 20/21 and 49/54
20/21 + 49/54 is 703/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
20/21 = 20 × 18/21 × 18 = 360/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
49/54 = 49 × 7/54 × 7 = 343/378 - Add the two like fractions:
360/378 + 343/378 = 360 + 343/378 = 703/378 - So, 20/21 + 49/54 = 703/378
In mixed form: 1325/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+49/54 20/21+98/54 20/42+49/54 60/21+49/54 20/63+49/54