Understanding Percentages and Conversions

This video tutorial covers the percent change formula, including how to calculate percent increase and decrease. It explains converting percentages to decimals and vice versa, and finding the percent of a number. The tutorial also covers converting fractions to decimals and decimals to fractions, with practical examples and word problems to reinforce learning.

What is the percent change when a value increases from 30 to 50?

• 75%

• 66.7%

• 50%

• 33.3%

How do you convert 85% into a decimal?

• 85.0

• 0.085

• 8.5

• 0.85

What is 30% of 90?

• 27

• 30

• 9

• 18

Convert the fraction 1/4 into a decimal.

• 0.4

• 0.25

• 0.75

• 0.5

What is the decimal representation of 0.444...?

• 1/3

• 4/9

• 5/9

• 2/5

If a laptop costs $200 and the sales tax is 8%, what is the final price?

• $208

• $216

• $220

• $210

A stock price decreases by 50% and then increases by 50%. What is the overall percent change?

• -50%

• 25%

• -25%

• 0%

How do you calculate the original price if the final price is $133.75 including a 7% sales tax?

• Add 7%

• Subtract 7%

• Multiply by 1.07

• Divide by 1.07

What is the final price of a textbook costing $120 after a 10% discount and a 6% sales tax?

• $114.48

• $120

• $112

• $108

If a value decreases by 10% and then increases by 6%, what is the overall percent change?

• -4%

• -4.6%

• 0%

• 4%