1. Percentages and Percent Composition Created by The North Carolina School of Science and Math.The North Carolina School of Science and Math Copyright 2012. North Carolina Department of Public Instruction.North Carolina Department of Public Instruction Created by The North Carolina School of Science and Math.The North Carolina School of Science and Math Copyright 2012. North Carolina Department of Public Instruction.North Carolina Department of Public Instruction

2. Percentages Percent

3. Percentages Examples? 30% 0.5% 120%

5. Percentages: Basic Equation

6. Percentages: Types of Problems What you KnowWhat you are Trying to Find Whole and PartPercentage Whole and Percentage Part Percentage and Part Whole

7. Percentages: Examples You are testing a airplane wing design in a wind tunnel. You complete 20 trials total. Only 15 of these trials were successful. What percentage of trials were successful?

8. Percentages: Examples You are studying a specific metal alloy. You know that 10% of the alloy is made of steel. If you have a 50 gram sample of this material, how much of the material is steel?

9. Percentages: Examples You have spent $120.00 on various materials for the prototype which you are designing. You know this is 80% of your design budget. What is your total budget?

10. Percent Composition In Material Science… Percent Composition is used to determine the amount of each element in a compound Why should Engineers care about this?