Part I: Finding the Percent of a Given Number To find the percent of a given number, change the percent to a decimal and MULTIPLY. Example: 30% of 400 % = .30 Step 400 Step 2: x .30 12000 Step 3: Count the digits behind the decimal in the problem and add decimal to the answer. 120.00 120 Part II: Finding the Percentage of a Number To find what percentage one number is of another, divide the first number by the second, then convert the decimal answer to a percentage. What percentage is 12 of 25? Example: 12/25 = .48 Step 1: .48 = 48% (12 is 48% of 25) Step 2: Part : Finding Percentage Increase or Decrease To find a percentage increase or decrease, first find the percent change, then add or subtract the change to the original number. Kindles have dropped in price 18% from $139. What is the new price of a Example: Kindle? $139 x .18 = $25 Step 1: $139 - $25 = $114 Step 2: Part IV: Finding a Value To find a total value, given a percentage of the value, DIVIDE the given number by the given percentage. If taxes on a new car are 8% and the taxes add up to $1600, how much is the Example: new car? 8% = .08 Step 1: $1600 / .08 = $160,000 / 8 = $20,000 Step 2: (Remember when the divisor has a decimal, move it to the end to make it a whole number and move the decimal in the dividend the same number of places. .08 becomes 8, 1600 becomes 160000.) Part V: Calculating percent change Percentage change is calculated this way:
Part I: Finding the Percent of a Given Number To find the percent of a given number, change the percent to a decimal and MULTIPLY. Example: 30% of 400 Step % = .30 Step 2: 400 x .30 12000 Step 3: Count the digits behind the decimal in the problem and add decimal to the answer. 120.00 120 Part II: Finding the Percentage of a Number To find what percentage one number is of another, divide the first number by the second, then convert the decimal answer to a percentage. Example: What percentage is 12 of 25? Step 1: 12/25 = .48 Step 2: .48 = 48% (12 is 48% of 25) Part : Finding Percentage Increase or Decrease To find a percentage increase or decrease, first find the percent change, then add or subtract the change to the original number. Example: Kindles have dropped in price 18% from $139. What is the new price of a Kindle? Step 1: $139 x .18 = $25 Step 2: $139 - $25 = $114 Part IV: Finding a Value To find a total value, given a percentage of the value, DIVIDE the given number by the given percentage. Example: If taxes on a new car are 8% and the taxes add up to $1600, how much is the new car? Step 1: 8% = .08 Step 2: $1600 / .08 = $160,000 / 8 = $20,000 (Remember when the divisor has a decimal, move it to the end to make it a whole number and move the decimal in the dividend the same number of places. .08 becomes 8, 1600 becomes 160000.) Part V: Calculating percent change Percentage change is calculated this way:
APES%20Summer%20Assignment%2017.docx