Discount/Markdown
The amount subtracted from
the original price
Percent Test Cheat Sheet
Markup
The amount added to the
price the store bought an
item for to make a profit
discount rate (%) • price
Sales Tax
The amount added to the total
and given to the government
tax rate (%) • price
Mark-up rate (%) • price
To find the sale price
SUBTRACT the discount
from the price
To find the selling price,
ADD the markup to the
original price
Commission/Fees
Tip/Gratuity
A paycheck that is based on a
percent of what is sold
The amount added to the
total given to the waiter
commission rate (%) • sales
tax rate (%) • price
Tip gets ADDED to the
total bill
Percent Error
The percent of error that was
made or the percent they were
wrong
To find the total cost, ADD
the tax to the sale price
Interest
€
The amount you pay the
bank on your loan
Percent Change
The percent a price increases
or decreases from its original
amount
Change
Original
Remember to change answers
from decimals to percents!!
Principal
The original amount you
deposit or borrow.
Principal • rate(%) • time
Error
Actual
€
Remember to change answers
from decimals to percents!!
The base, the starting amount
for invested money
I = prt, use when a word
problem has: invest, put in
the bank, loan, deposit
Percent Word Problems
Conversions
Find the Original
Use the equation:
% • whole = part
or
% • of = is
To change from decimal to
a percent, move the decimal
two places to the right
0.45 = 45% or 0.05 = 5%
For the original in Discount
problem, take the % discount
and subtract from 100. Then
divide the sale price by that
percent that you pay.
Remember a % is just the
part
fraction
that after you
whole
divide, you change that
decimal to a percent
To change from a percent to
a decimal, move the decimal 20% discount, I paid $30 for
point two places to the left
the shirt:
25% = 0.25 or 7% = 0.07 100% - 20% = 80% = 0.80
30
Original =
= $37.50
0.80
€
€
Megan Collins
Friday, December 11, 2015 at 7:03:40 PM Eastern Standard Time
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