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Lesson Example Discussion Quiz: Class Homework

Quiz At Home

Title: Percentage Decrease

Grade: 1300-a Lesson: S4-L4

Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the ten problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts.

Quiz: at Home

Problem Id	Problem	Options
1	What was the percentage decrease in Vicky’s weight from March, when he weighed 90kg, to June, when he weighed 84.5kg?	A) 9.70% B) 5.50% C) 6.11% D) 6.00%
2	In a bottle of water containing 1000ml of drink, 15ml of water is taken out per sip. Calculate the percentage decrease in the quantity of water after 25 sips.	A) 39.75% B) 40% C) 38% D) 37.50%
3	A company has 45 employees. If 20 of them are laid off and the salaries of the remaining employees are increased by 44%, what is the overall change in the company’s expenditure on salaries?	A) 30% B) 20% C) 40% D) 50%
4	If the population of a place increased by 45% in one year and then decreased by 45% the following year, what is the net percentage change in the population compared to the initial population?	A) 20.25% B) 29.75% C) 30% D) 27.75%
5	Two numbers are each less than a third number by 90% and 97% respectively. What percent is the second number less than the first number?	A) 70% B) 80.45% C) 64% D) 50%
6	What number decreases by 84.6% to become 4300?	A) 29722 B) 27922 C) 29272 D) 27292
7	The number 84 was incorrectly read as 36. What is the percent decrease?	A) 58% B) 57.14% C) 64.45% D) 47.41%
8	The price of tomatoes was originally Rs. 380 per dozen. The seller has now reduced the price by 10%. What is the new price per dozen tomatoes after the reduction?	A) Rs. 432 B) Rs. 356 C) Rs. 342 D) Rs. 234
9	What is the athlete’s new running speed after their running speed decreased by 22% from their original speed of 12 miles per hour due to an injury?	A) 14.24 miles B) 10 miles C) 9.36 miles D) 9 miles
10	What percentage decrease occurred in Raju’s bank account balance, dropping from Rs. 46,800 last week to Rs. 2,900 now?	A) 89% B) 56.45% C) 80.45% D) 93.80%

Problem Id

Problem

Options

What was the percentage decrease in Vicky’s weight from March, when he weighed 90kg, to June, when he weighed 84.5kg?

A) 9.70%

B) 5.50%

C) 6.11%

D) 6.00%

In a bottle of water containing 1000ml of drink, 15ml of water is taken out per sip. Calculate the percentage decrease in the quantity of water after 25 sips.

A) 39.75%

B) 40%

C) 38%

D) 37.50%

A company has 45 employees. If 20 of them are laid off and the salaries of the remaining employees are increased by 44%, what is the overall change in the company’s expenditure on salaries?

A) 30%

B) 20%

C) 40%

D) 50%

If the population of a place increased by 45% in one year and then decreased by 45% the following year, what is the net percentage change in the population compared to the initial population?

A) 20.25%

B) 29.75%

C) 30%

D) 27.75%

Two numbers are each less than a third number by 90% and 97% respectively. What percent is the second number less than the first number?

A) 70%

B) 80.45%

C) 64%

D) 50%

What number decreases by 84.6% to become 4300?

A) 29722

B) 27922

C) 29272

D) 27292

The number 84 was incorrectly read as 36. What is the percent decrease?

A) 58%

B) 57.14%

C) 64.45%

D) 47.41%

The price of tomatoes was originally Rs. 380 per dozen. The seller has now reduced the price by 10%. What is the new price per dozen tomatoes after the reduction?

A) Rs. 432

B) Rs. 356

C) Rs. 342

D) Rs. 234

What is the athlete’s new running speed after their running speed decreased by 22% from their original speed of 12 miles per hour due to an injury?

A) 14.24 miles

B) 10 miles

C) 9.36 miles

D) 9 miles

What percentage decrease occurred in Raju’s bank account balance, dropping from Rs. 46,800 last week to Rs. 2,900 now?

A) 89%

B) 56.45%

C) 80.45%

D) 93.80%