Expressing Quantities as a Percentage

The video tutorial explains the concept of percentages, their relation to fractions and decimals, and methods to convert fractions into percentages. It covers unit conversion in percentage calculations and demonstrates how to find a percentage of an amount using the unitary method and multipliers. The tutorial also explains calculating percentage change, providing examples for better understanding.

What is the first step in expressing a number as a percentage of another?

• Multiply the numbers by 100

• Turn the numbers into a fraction

• Divide the numbers by 10

• Convert the number to a decimal

How do you convert 45 minutes as a percentage of 3 hours?

• Divide 45 by 60 and multiply by 100

• Convert 3 hours to minutes and form a fraction with 45

• Multiply 45 by 3 and divide by 100

• Add 45 to 180 and divide by 100

What is the unitary method used for?

• Simplifying fractions

• Converting fractions to decimals

• Calculating the percentage of an amount

• Finding the percentage change

How do you find 35% of a number using the multiplier method?

• Multiply the number by 0.35

• Divide the number by 35

• Add 35 to the number

• Subtract 35 from the number

Which method is more suitable for non-calculator settings?

• Unitary method

• Fraction method

• Multiplier method

• Decimal method

What is the formula for calculating percentage change?

• Difference between values divided by the original value, times 100

• Product of values divided by the original value, times 100

• Sum of values divided by the original value, times 100

• Difference between values divided by the new value, times 100

If a painting was bought for £3,000 and sold for £5,000, what is the percentage increase?

• 50%

• 75%

• 66.7%

• 33.3%