Calculating Percentage Change in Donations

The video tutorial explains how to calculate the percentage increase in the number of books in a library after a donation. It introduces the problem, explains the percent change formula, and demonstrates its application to find the percentage increase from 465 to 550 books, resulting in an 18.3% increase.

How many books were initially in the school library before the donation?

• 600

• 500

• 550

• 465

What was the total number of books in the library after the donation?

• 465

• 550

• 600

• 500

What is the main concept being discussed in this section?

• Library management

• Arithmetic operations

• Book donation

• Percentage change

Which of the following is the correct formula for calculating percentage change?

• Final - Original

• (Final - Original) / Original

• (Original - Final) / Final

• Final + Original

What is the first step in calculating the percentage change?

• Add the original and final

• Multiply by 100

• Divide by the final

• Subtract the original from the final

After subtracting the original number of books from the final number, what is the next step?

• Multiply by 100

• Add the original number

• Subtract 100

• Divide by the original number

What is the result of 550 minus 465?

• 85

• 95

• 75

• 105

What is the percentage increase in the number of books?

• 18.3%

• 20%

• 15%

• 25%

What is the final step in calculating the percentage increase?

• Subtract the original number

• Multiply by 100

• Divide by the final number

• Add the original number

What is the decimal result of dividing 85 by 465?

• 0.185

• 0.827

• 0.927

• 0.365