Add 4/21 and 12/54
4/21 + 12/54 is 26/63.
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,
4/21 = 4 × 18/21 × 18 = 72/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
12/54 = 12 × 7/54 × 7 = 84/378 - Add the two like fractions:
72/378 + 84/378 = 72 + 84/378 = 156/378 - 156/378 simplified gives 26/63
- So, 4/21 + 12/54 = 26/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+12/54 4/21+24/54 4/42+12/54 12/21+12/54 4/21+36/54 4/63+12/54 20/21+12/54 4/21+60/54 28/21+12/54 4/21+84/54