Quantity, percentage, percentage value: Applying the formula

The Whole number is Greater than 100Change in two elementsFinding the whole using a partPricing strategies including discounts and markupsCalculation using percentagesConvert fractions to percentagesThe Whole number is a Multiple of 100The Whole number is 100Calculate the percentage of the whole numberExpress one number as a percentage of another
Question 1

A toy costing $40 is reduced by 20%

What is the new price following the discount?

Question 2

Calculate 7% of 40:

Question 3

Calculate 14 over 90 as a percentage:

Question 4

Calculate 25% of 86:

Examples with solutions for Quantity, percentage, percentage value: Applying the formula

Exercise #1

A toy costing $40 is reduced by 20%

What is the new price following the discount?

Video Solution

Step-by-Step Solution

40−8=32 40-8=32

In order to determine percentages, we must make use of the two pieces of information in our possession: the total amount (40)andthediscount(2040) and the discount (20%).</p><p>This information can be inserted into the following formula:</p><p><span class="katex">\( \frac{Price\times\text{Percentage}}{100} Which allows us to find the percentage of something.

We insert the given information:

40×20100= 40\times\frac{20}{100}=
800100= \frac{800}{100}=

8 8

We then discover that the value of the discount is 8.

But we are not finished yet!

We need to subtract the discount from the original amount in order to determine the sale price:
\( 40-8=32

Answer

32

Exercise #2

Calculate 7% of 40:

Video Solution

Answer

2.8

Exercise #3

Calculate 14 over 90 as a percentage:

Video Solution

Answer

15.555...%

Exercise #4

Calculate 25% of 86:

Video Solution

Answer

21.5