Understanding Percentages and Decimals

The video tutorial explains how to calculate percent increase using two examples. The first example demonstrates the calculation of a 60% increase from 5 to 8, while the second example shows a 50% increase from 20 to 30 students. The process involves finding the change, dividing by the original number, converting to a decimal, and then to a percentage.

What is the first step in finding the percent increase?

• Identify the larger number as the original.

• Identify the smaller number as the original.

• Subtract the original number from the new number.

• Multiply the original number by 100.

In problem 1, what is the change in value from 5 to 8?

• 8

• 5

• 3

• 2

How do you convert a fraction to a decimal?

• Subtract the denominator from the numerator.

• Add the numerator and denominator.

• Divide the numerator by the denominator.

• Multiply the numerator by 100.

What is the decimal equivalent of 3/5?

• 0.3

• 0.5

• 0.8

• 0.6

How do you convert a decimal to a percentage?

• Divide by 10.

• Move the decimal point two places to the left.

• Move the decimal point two places to the right.

• Multiply by 10.

In problem 2, what is the change in the number of students from 20 to 30?

• 15

• 5

• 20

• 10

What is the decimal equivalent of 10/20?

• 0.5

• 0.2

• 0.3

• 0.4

What is the percent increase from 20 to 30 students?

• 75%

• 50%

• 25%

• 100%