Add 28/40 and 2/81
28/40 + 2/81 is 587/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
28/40 = 28 × 81/40 × 81 = 2268/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
2/81 = 2 × 40/81 × 40 = 80/3240 - Add the two like fractions:
2268/3240 + 80/3240 = 2268 + 80/3240 = 2348/3240 - 2348/3240 simplified gives 587/810
- So, 28/40 + 2/81 = 587/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+2/81 28/40+4/81 28/80+2/81 84/40+2/81 28/40+6/81 28/40+10/81 28/40+14/81