Percentage Calculations and Concepts

The video tutorial covers solving percentage problems using a key equation: part over whole equals percent over 100. It explains percentages as ratios and provides common conversions. The tutorial demonstrates solving various percentage problems and includes six sample SAT problems to illustrate these concepts. The video concludes with a call to subscribe for more SAT content.

What is the basic equation used to solve percentage problems?

• Part over whole equals percent over 100

• Whole over part equals percent over 100

• Part times whole equals percent over 100

• Whole times part equals percent over 100

How do you convert a decimal to a percentage?

• Divide by 100

• Divide by 10

• Multiply by 100

• Multiply by 10

What is 0.25 as a percentage?

• 20%

• 30%

• 15%

• 25%

If 10% of a number is 6, what is 5% of the same number?

• 4

• 3

• 2

• 5

In the equation 'part over whole equals percent over 100', what does 'part' represent?

• The total amount

• The whole number

• The portion of the total

• The percentage

A water bill increased from $74.75 to $79.86. What is the percentage increase?

• 4.5%

• 5.4%

• 7.2%

• 6.3%

If 7% of juniors and 5% of seniors are inducted into a society, how many juniors are inducted if there are 562 juniors?

• 39

• 40

• 41

• 42

What is 20% less than 40?

• 34

• 32

• 30

• 28

A tax deduction decreased an amount by $2,325. What percentage of $15,500 is this?

• 12%

• 13%

• 14%

• 15%

Type A trees produce 20% more pears than Type B. If Type A produces 144 pears, how many does Type B produce?

• 110

• 115

• 120

• 125