Add 2/81 and 15/40
2/81 + 15/40 is 259/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
2/81 = 2 × 40/81 × 40 = 80/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
15/40 = 15 × 81/40 × 81 = 1215/3240 - Add the two like fractions:
80/3240 + 1215/3240 = 80 + 1215/3240 = 1295/3240 - 1295/3240 simplified gives 259/648
- So, 2/81 + 15/40 = 259/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81+15/40 2/81+30/40 2/81+15/80 6/81+15/40 2/81+45/40 10/81+15/40 2/81+75/40 14/81+15/40