Add 5/20 and 4/81
5/20 + 4/81 is 97/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
5/20 = 5 × 81/20 × 81 = 405/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
4/81 = 4 × 20/81 × 20 = 80/1620 - Add the two like fractions:
405/1620 + 80/1620 = 405 + 80/1620 = 485/1620 - 485/1620 simplified gives 97/324
- So, 5/20 + 4/81 = 97/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20+4/81 5/20+8/81 5/40+4/81 15/20+4/81 5/20+12/81 5/60+4/81 25/20+4/81 5/20+20/81 35/20+4/81 5/20+28/81