Question

pls solve the question quickly

Answer 1

Answer:

Let number is 15a.

wrong answer= 15a*(3/5)=9a

right answer= 15a*(5/3)=25a

so error = 25a-9a=16a

percentage of error= 16a/25a*100= 64%

Step-by-step explanation:

Answer 2

Let the number be x

So, we have :

When x is multiplied with correct value :
5/3 x

When x is multiplied with the wrong value :
3/5 x

So, error is =

correct value - wrong value

= $\frac{5x}{3} - \frac{3x}{5} = \frac{16x}{15}$

(on cross multiplying⬆️⬆️)

Now, % error :
(refer image)