Add 2/81 and 4/20
2/81 + 4/20 is 91/405.
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,
2/81 = 2 × 20/81 × 20 = 40/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
4/20 = 4 × 81/20 × 81 = 324/1620 - Add the two like fractions:
40/1620 + 324/1620 = 40 + 324/1620 = 364/1620 - 364/1620 simplified gives 91/405
- So, 2/81 + 4/20 = 91/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81+4/20 2/81+8/20 2/81+4/40 6/81+4/20 2/81+12/20 2/81+4/60 10/81+4/20 14/81+4/20 2/81+28/20