Add 21/54 and 20/14
1st number: 21/54, 2nd number: 1 6/14
21/54 + 20/14 is 229/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 14 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Likewise, for the 2nd fraction, since 14 × 27 = 378,
20/14 = 20 × 27/14 × 27 = 540/378 - Add the two like fractions:
147/378 + 540/378 = 147 + 540/378 = 687/378 - 687/378 simplified gives 229/126
- So, 21/54 + 20/14 = 229/126
In mixed form: 1103/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+20/14 21/54+40/14 21/54+20/28 63/54+20/14 21/54+60/14 21/54+20/42 21/54+20/70 21/54+20/98