2. Percent Equation
• Percent x Whole = Part
– 10% of 100 = n
– Change Percent to a decimal
– Of means MULTIPLY!!
– .10 x 100 = 10
3. Percent Equation
• Percent x Whole = Part
– 10% of What number equals 10?
– 10% of n = 10
– Change percent to a decimal.
– .10 x n = 10
– .10n=10
– Get n alone on one side of equation
– .10n/.10=10/.10
– n=100
4. Percent Equation
• Percent x Whole = Part
– What percent of 100 is 10?
– n of 100 = 10
– n x 100 = 10
– 100n=10
– Get n alone on one side of equation
– 100n/100=10/100
– n=.10 or 10%
5. Percent Equation
• You are at a restaurant. Your bill is $100. You
want to tip the waitress 10%. How much
money are you going to leave for the
waitress?
– 10% of $100 = n
– .10 x $100 = $10
You would tip the waitress $10.
7. Percent Equation
• You spent $100 on a pair of shoes. You saved
$10. What percent off did you receive?
– n of $100 = $10
– 100n=10
– 100n/100=10/100
– n=.10
– 10%