Add 36/40 and 80/81
36/40 + 80/81 is 1529/810.
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,
36/40 = 36 × 81/40 × 81 = 2916/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
80/81 = 80 × 40/81 × 40 = 3200/3240 - Add the two like fractions:
2916/3240 + 3200/3240 = 2916 + 3200/3240 = 6116/3240 - 6116/3240 simplified gives 1529/810
- So, 36/40 + 80/81 = 1529/810
In mixed form: 1719/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+80/81 36/80+80/81