Add 4/21 and 54/56
4/21 + 54/56 is 97/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
4/21 = 4 × 8/21 × 8 = 32/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
54/56 = 54 × 3/56 × 3 = 162/168 - Add the two like fractions:
32/168 + 162/168 = 32 + 162/168 = 194/168 - 194/168 simplified gives 97/84
- So, 4/21 + 54/56 = 97/84
In mixed form: 113/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+54/56 4/42+54/56 12/21+54/56 4/63+54/56 20/21+54/56 28/21+54/56