Question

the price of petrol went up by 25%. In order that the expense on petrol does not increase, one must reduce its consumption by ?​

Answer 1

20%

Description for Correct answer:–

Let original price of petrol be Re.1.

Increase in price = 25%

Increased price = $1× \frac{100+25}{100}$ = Rs. $\frac{125}{100}$ =Rs.5/4

Hence one must use reciprocal i.e., 4/5 of the original amount,

so that expenses remain the same.

Therefore, Reduction = 1−4/5=1/5 = 20%

Answer 2

Answer:

$\blue{ANSWER:-}$

Step-by-step explanation:

20% must be the reduction :-

price of the petrol increased = 25%

therefore = 1/4

Let the total price = 4.

increased 4 -------> 5 i.e, = -1

% reduction = 1/5× 100 = 20%

HOPE YOU GOT IT....