Question

What is the sum of 3/4 and 4/5

Answer 1

We have:

$\dfrac{3}{4}$ and $\dfrac{4}{5}$

We have to find, the sum of $\dfrac{3}{4}$ and $\dfrac{4}{5}$.

Solution:

∴ $\dfrac{3}{4}$ + $\dfrac{4}{5}$

4 = 2 × 2 and 5 =  5 × 2

∴ LCM of 4 and 5 = 2 × 2 × 5 = 20

$\dfrac{3}{4}$ + $\dfrac{4}{5}$

= $\dfrac{5\times 3+ 4\times 4}{20}$

= $\dfrac{15+ 16}{20}$

= $\dfrac{31}{20}$

∴ $\dfrac{3}{4}$ + $\dfrac{4}{5}$ = $\dfrac{31}{20}$

Thus, the summation of $\dfrac{3}{4}$ and $\dfrac{4}{5}$ is $\dfrac{31}{20}$.

Answer 2

Given :   3/4  and 4/5

To Find : Sum

Solution:

Sum of 3/4 and 4/5

= 3/4  + 4/5

LCM of Denominators = 20

= 3/4  x 20/20   + 4/5 x 20/20

= 3 x 5/20  + 4 x 4/20

= 15/20  + 16/20

= (15 + 16)/20

= 31/20

= 1  11/20

= 1.55

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