Question

5. The cost of my school exercise book was Rs. 10. Now she has to pay Rs

Answer 1

Given :-

• Cost of school exercise book was Rs. 10

• Now , she had to pay Rs. 12 for it .

To Find :-

• The increase percentage of price of that book .

Solution :-

$\underline{\bf{\dag} \:\bold{As\;we\;know\: that\: :}}$

$\sf Increase \% = \dfrac{(Value\;Increased)}{Initial\; Value} \times 100 \%$

According to the question,

→ Increase of Price = ( Rs. 12 - Rs. 10 )

  ⇒ Rs. 2

→ Initial Value  = Rs. 10

Let's solve by putting the values in the formula !

$\sf \leadsto \dfrac{2}{10} \times 100 \%$

⇝2×10%

⇝20%

∴ The percent of increase in price of that school exercise book is 20 %