You are given sh. 1000 by your parent to go and buy an exercise book for sh. 800 from the nearby shop. What is percentage of the book?

To find the percentage, we need to determine what portion of the given amount represents the price of the exercise book. In this case, we are given sh. 1000 and the exercise book costs sh. 800.

The first step is to calculate the difference between the amount given (sh. 1000) and the price of the exercise book (sh. 800):

sh. 1000 - sh. 800 = sh. 200

The difference of sh. 200 represents the amount that remains after buying the exercise book. This amount (sh. 200) is not used for purchasing the book.

Next, we calculate the percentage by dividing the price of the exercise book (sh. 800) by the total amount given (sh. 1000), and multiplying the result by 100 to express it as a percentage:

(sh. 800 / sh. 1000) * 100 = 80%

Therefore, the exercise book represents 80% of the total amount given (sh. 1000).