Percent Proportions (Day 1) Tuesday, February 02, 2016 We are learning to…find parts, totals and percents using proportional reasoning.

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Presentation transcript:

Percent Proportions (Day 1) Tuesday, February 02, 2016 We are learning to…find parts, totals and percents using proportional reasoning.

Vocabulary… Percent – A number that is expressed out of a total of 100. PERCENT “for every…100”

Percent Proportions Situation: What percent is 2 out of a total of 5? Part Total What is this question asking us to find?…The Percent (100) 2 is 40% of 5. When setting up your tables today think of the relationships in terms of parts and totals. PartsTotals 25 x100 Table: Proportion and Solution Process: Solution:

Percent Proportions Situation: What number is 14% of 300? PartTotal What is this question asking us to find?…The Part! (14) 42 is 14% of 300. When setting up your tables today think of the relationships in terms of parts and totals. PartsTotals x Table: Proportion and Solution Process: Solution:

Percent Proportions Situation: 60 is 75% of what number? PartPart What is this question asking us to find?…The Total! (60) 60 is 75% of 80. When setting up your tables today think of the relationships in terms of parts and totals. PartsTotals 60x Table: Proportion and Solution Process: Solution:

Group Practice As you work today look for clues: “of” will typically indicate a total “is” usually indicates a part A “%” symbol of course indicates a percent. Analyze the question carefully before starting…identify the part, total and percent before starting to solve. Set up a proportion and then use your equation solving skills to find your solution. Try to simplify the ratios in your proportional equations if possible. Write your solution in the form of a sentence.

What number is 45% of 20? A. 44 B C. 9 D. 8 E. I need help with this question.

36 is 24% of what number? A. 150 B C. 146 D. 60 E. I need help with this question.

What percent is 3 of 20? A. 17% B % C. 3% D. 15% E. I need help with this question.