Add 1/21 and 35/54
1/21 + 35/54 is 263/378.
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,
1/21 = 1 × 18/21 × 18 = 18/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
35/54 = 35 × 7/54 × 7 = 245/378 - Add the two like fractions:
18/378 + 245/378 = 18 + 245/378 = 263/378 - So, 1/21 + 35/54 = 263/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+35/54 1/21+70/54 1/42+35/54 3/21+35/54 1/63+35/54 5/21+35/54 7/21+35/54