Add 3/4 and 54/81
3/4 + 54/81 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
3/4 = 3 × 81/4 × 81 = 243/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
54/81 = 54 × 4/81 × 4 = 216/324 - Add the two like fractions:
243/324 + 216/324 = 243 + 216/324 = 459/324 - 459/324 simplified gives 17/12
- So, 3/4 + 54/81 = 17/12
In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/4+54/81 3/8+54/81 9/4+54/81 3/12+54/81 15/4+54/81 3/20+54/81 21/4+54/81 3/28+54/81