Add 4/7 and 54/81
4/7 + 54/81 is 26/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
4/7 = 4 × 81/7 × 81 = 324/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
54/81 = 54 × 7/81 × 7 = 378/567 - Add the two like fractions:
324/567 + 378/567 = 324 + 378/567 = 702/567 - 702/567 simplified gives 26/21
- So, 4/7 + 54/81 = 26/21
In mixed form: 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/7+54/81 4/14+54/81 12/7+54/81 4/21+54/81 20/7+54/81 4/35+54/81 28/7+54/81 4/49+54/81