Add 7/21 and 56/54
1st number: 7/21, 2nd number: 1 2/54
7/21 + 56/54 is 37/27.
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,
7/21 = 7 × 18/21 × 18 = 126/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
56/54 = 56 × 7/54 × 7 = 392/378 - Add the two like fractions:
126/378 + 392/378 = 126 + 392/378 = 518/378 - 518/378 simplified gives 37/27
- So, 7/21 + 56/54 = 37/27
In mixed form: 110/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+56/54 7/42+56/54 7/63+56/54 35/21+56/54 49/21+56/54