Add 21/14 and 54/8
1st number: 1 7/14, 2nd number: 6 6/8
21/14 + 54/8 is 33/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 14 × 4 = 56,
21/14 = 21 × 4/14 × 4 = 84/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
54/8 = 54 × 7/8 × 7 = 378/56 - Add the two like fractions:
84/56 + 378/56 = 84 + 378/56 = 462/56 - 462/56 simplified gives 33/4
- So, 21/14 + 54/8 = 33/4
In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+54/8 21/28+54/8 21/14+54/16 63/14+54/8 21/42+54/8 21/14+54/24 21/70+54/8 21/14+54/40 21/98+54/8 21/14+54/56