Add 1/81 and 45/20
1st number: 1/81, 2nd number: 2 5/20
1/81 + 45/20 is 733/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
1/81 = 1 × 20/81 × 20 = 20/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
45/20 = 45 × 81/20 × 81 = 3645/1620 - Add the two like fractions:
20/1620 + 3645/1620 = 20 + 3645/1620 = 3665/1620 - 3665/1620 simplified gives 733/324
- So, 1/81 + 45/20 = 733/324
In mixed form: 285/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81+45/20 1/81+90/20 1/81+45/40 3/81+45/20 1/81+45/60 5/81+45/20 7/81+45/20