R K Bansal Solutions for Chapter: Percent and Percentage, Exercise 1: EXERCISE 7(A)

The cost of a scooter depreciates every year by $15\%$ of its value at the beginning of the year. If the present cost of the scooter is $₹ 8,000$; find the Cost of scooter after one year.

The cost of a scooter depreciates every year by $15\%$ of its value at the beginning of the year. If the present cost of the scooter is $₹ 8,000$; find the Cost of scooter after $2$ years.

In an objective type paper of $150$ questions, John got $80\%$ correct Answer and mohan got $64\%$correct answer.

How many correct answers did each get?

In an objective type paper of $150$ questions, John got $80\%$ correct Answer and mohan got  $64\%$correct answer.

What percent is Mohan’s correct answer to John correct answer?

The number $8,000$ is first increased by $20\%$ and then decreased by $20\%$. Find the resulting number.

The number $12,000$ is first decreased by $25\%$ and then increased by $25\%.$ Find the resulting number.

The cost of an article is first increased by $20\%$ and then decreased by $30\%$, find the percentage change in the cost of the article.

The cost of an article is first decreased by $25\%$ and then further decreased by $40\%$. Find the percentage change in the cost of the article.