# Percentage Calculator

## What is Percentage?

Percentage, describes the calculation required to obtain of the proportion between the total quantity and its parts. The forms used for the representation are: percentage form, fractional form and decimal form.

How much is
%
of

Example: What is 30% of 450?
The value
is what percentage of

%

Example: The value 1025 represents how many percent of 4250?
The value
increased to

growth of
%

Example: The value 57 increased to 98, what is the percentage of growth?
The value
increased (increase)
%

Example: The value 33 increased by 66%, what is the final value?
The value
decreased (discount)
%

Example: A product that costs \$570.00 had a 15% discount, what is the final value of this item?
Initial value
Final value

varied
%

Example: The value 45 was changed to 77, what was the percentage change?
I paid
with discount of
%

the original value

Example: I paid \$445 for a product that was 30% off, what was the original value of the item?
How much to sell an item for
to make a profit of
%

Sell the item for

Example: I bought an item for \$50, how much should I sell it for to get a 7% profit?

### How to calculate discount on an item

The formula for calculating a discount percentage is represented by:

discount item = item value * (1 - (Discount%/100))

Example: An item that costs R\$360.00 received a 22% discount.
Calculate the final value of the product.

discounted item = \$360.00 * (1 - (22/100))

discounted item = \$360.00 * (1 - 0.22)

\$280.80 = \$360.00 * 0.78

### How to calculate markup on an item

The formula for calculating a discount percentage is represented by:

item with increment = item value * (1 + (Increment%/100))

Example: When paying by card, an item costing R\$75.00 received a 5% surcharge.
Calculate the final value of the product.

item with addition = \$75.00 * (1 + (5/100))

item with addition = \$75.00 * (1 + 0.05)

\$78.75 = \$75.00 * 1.05

### How to calculate the percentage on top of value

The formula for calculating a percentage is presented below:

final value = initial value * (percentage%/100))

Example: How much is 35% of 1000.

final value = 1000 * (35/100))

final value = 1000 * 0.35

final value = 350