Percentage Calculations and Conversions

This video tutorial covers a range of mathematical problems, focusing on percentage calculations, fraction to decimal conversions, and simple interest. It provides step-by-step solutions to questions 11 to 20 from a test review, including calculating school attendance percentages, converting fractions to decimals, determining percentage increases and decreases, and finding sale prices after discounts. The video concludes with a prompt to subscribe for more content.

What is the main focus of the video tutorial?

• Introducing new mathematical concepts

• Reviewing questions 11 to 20

• Reviewing questions 1 to 10

• Discussing the history of mathematics

If students attend school for 180 out of 365 days, what percentage of the year do they attend?

• 45%

• 50%

• 60%

• 75%

How do you convert a fraction to a decimal?

• Multiply the numerator by 100

• Divide the numerator by the denominator

• Add the numerator and denominator

• Subtract the denominator from the numerator

What is the decimal equivalent of 3/8?

• 0.625

• 0.5

• 0.375

• 0.25

How do you convert a fraction to a percentage?

• Add 100 to the fraction

• Divide the fraction by 100

• Multiply the fraction by 100

• Subtract 100 from the fraction

What is the percentage equivalent of 7/16?

• 37.5%

• 43.75%

• 44%

• 50%

What is the formula for calculating percentage increase?

• Change minus original times 100

• Original plus change times 100

• Change divided by original times 100

• Original divided by change times 100

If a movie ticket price increases from $4 to $5, what is the percentage increase?

• 30%

• 20%

• 50%

• 25%

If magazine sales increase from 500,000 to 600,000, what is the percentage increase?

• 25%

• 10%

• 15%

• 20%

What is the formula for calculating percentage decrease?

• Original divided by change times 100

• Change minus original times 100

• Change divided by original times 100

• Original plus change times 100