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Percent as fraction
"percenatge of"
part/total = %
% * total = part
part/% = total
Absolute change
New- old
if given in percents units for absolute change are percentage points
Percent change
new-old/old
Absolute and Relative difference
not absolute change
percentage more than; percentage less than
larger-smaller/the quantity after "than"
Increasing or decreasing by a percent
# * (1 + .%) = Pecent increase
# * (1 - .%)= Percent decrease
Successive percentage change
multiple increases or decreases in percent
org # * (1 +or- .%) = X
X * (1 +or- .%) =Y
continue as needed
Solve for Original
Finding original # that has been reduced = new/(1-.%)
Finding original # that has been increased = new/(1+.%)
Ratios
1st #/ 2nd #
Ratios
percent more or less than
Assuming A=5; B=4
A is what percent more than B =25% more
B is what percent less than A =20% less
Ratios
percent of
Assuming A=5; B=4
A is what percent of B = 125%
B is what percent of A = 80%
Rate per 10,000
Example death rates of hunting
600 deaths/2000000 hunters = .0003
.0003*10,000 = 3
3 deaths per 10,000 participants
Linear Equation?
y = mx + b
where m=slope or rate of change
b= y intercept or inital value
yintercept or inital value= y value when x equals 0
Rate of change formula?
B2-B1/A2-A1
Exponential Formula?
y = P*(1+or-r)^x
Where P = inital value(value of y when x = 0)
r = percent change (in decimal form)
x = independent variable (usually time)
y = dependent variable
Exponential relationship?
For an increase of 1 in x, y increases or decreases by a constant percent change.
Linear relationship?
as the x variable increases by 1, the y variable increases or decreases by a certain amount (rate of change)
Finding ratio of CPI?
new years CPI/old years CPI = CPI ratio
Converting to constant dollars?
X dollars in old year is worth how much in new year constant dollars
new year CPI/ old year CPI * X dollars = X dollars in new year constant dollars
Annual Inflation rate?
Percentage change in the CPI in one year from previous year
for example
1996 CPI-1995CPI/1995 CPI = Inflation rate
162.6-157.9/157.9 = 3.0% inflation rate for 1996
Finding monthly payments using excel?
fx icon in formula bar
drop down menu > finacial > PMT > box appears
Enter rate = APR (as a decimal) divided by 12
Enter NPer (total # of payments)= # of years *12
Enter Pv (principal) = amount of loan as negative # no commas
Absolute cell reference?
used to lock in a cell reference in a formula when working on tables so that as formula moves down the table it still refers to correct cell.
enter cell reference than hit F4 button
Author
ametzga
ID
174205
Card Set
Final Exam
Description
Final Exam
Updated
2013-03-07T00:45:27Z
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