Add 40/81 and 45/80
40/81 + 45/80 is 1369/1296.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 80 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 81 × 80 = 6480,
40/81 = 40 × 80/81 × 80 = 3200/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
45/80 = 45 × 81/80 × 81 = 3645/6480 - Add the two like fractions:
3200/6480 + 3645/6480 = 3200 + 3645/6480 = 6845/6480 - 6845/6480 simplified gives 1369/1296
- So, 40/81 + 45/80 = 1369/1296
In mixed form: 173/1296
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