Question

Tanu was asked to multiply a given number by 4/5 mistakes he divided the number by 4/5 his answer was 36 more than the correct answer what was the given number?​

Answer 1

Answer:

80

Step-by-step explanation:

Say x is the given number

Expected value is 4x/5

however there is a miscalculation due to which x is divided by 4/5.

Obtained value = 5x/4

Given that obtained value- expected value is 36

Thus 1.25x-0.8x = 36

Solving for x we get x = 80

Answer 2

ANSWER = 80

Step-by-step explanation:

Let the given number be x,

Original answer = 4/5x

 Wrong answer = x/1  /  4/5

                          = x multiplied by 5/4

                          = 5x/4

So,

5x/4 = 36 + 4x/5

5x/4 - 4x/5 = 36

(25x - 1) / 20 = 36

9x/20 = 36

x = (36 multiplied by 20)  /  9

So, x = 80

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