Question

Last year the price of petrol was Rs.45 per litre. Recently, the government increased the price of petrol to Rs.50 per litre. The percentage increase in the price of petrol is:
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Answer 1

Ꭺꪀꕶ᭙ꫀя :

Given that :-

Price of petrol in last year was Rs 45 per litre.

New price of petrol after increament is Rs 50 per litre.

Have to find :-

• Percentage increase

Concept :-

Here, at first we will assume the increase percentage as y Then, we will Subtract the new price by Old price and then we will use the formula [Increased amount/Original amount × 100 ]. Let's solve

Solution :-

Let the increased percentage be y

Increased Price = New Price - Old Price

Increased Price = 50 - 45

Increase in price = ₹5

Now,

y = [Increased amount/Original amount ] × 100

y = 5/45 × 100

y = 1/9 × 100

y = 1 × 100/9

y = 100/9

y = 11.11%

Hence :-

Let's Verify it

11.11 = 5/45 × 100

11.11 = 1/9 × 100

11.11 = 1 × 100/9

11.11 = 100/9

11.11 = 11.11

______________________

Answer 2

$\huge\bf\fbox\pink{ Solution :}$

Given:

Price of petrol in last year was Rs 45 per litre.

New price of petrol after increament is Rs 50 per litre.

To Find:

Percentage increase in the price of petrol ?

$\bold{Solution:}$ Let the percentage increase be x %. First of all let's find out "How much price of petrol increased" ?

To find this just subtract the initial price from current price.

➟ Increased price = Rs ( 50 – 45 )

➟ Rs 5

Now, let's find increased percentage

(Increased amount/Original amount) × 100

${\large{\underline{\sf{\pmb\implies{\rm }x = 5/45 × 100}}}}$

${\large{\underline{\sf{\pmb\implies{\rm } x = 1/9 × 100}}}}$

${\large{\underline{\sf{\pmb\implies{\rm } x = 100/9}}}}$

${\large{\underline{\sf{\pmb\implies{\rm } x = 11.11 \%}}}}$

Hence, the percentage increase in the price of petrol is 11.11 %.