The price of the storybook increased from $20 \ to \ $30 of its cost. Find the percentage rise in the price of the storybook.

Given: The Price Of The Storybook increased From Rs 20 To Rs30 

To find: The percentage increase in price of the story book

Solution:

Initial price = $20; Final price = $30

Increase in price = $30 - $20 = $10

Percent increase in price =  $\frac{Increase in price}{Initial price}$

                                               =  $\frac{10}{20}  \times 100$ = 50%

Therefore, the % increase is 50%