3. Percents in the Real World Grades Shopping Travel Chemistry Weather Interest Sales Tax Tips
4. What are Percents? A part of the whole Example: What percent of Pizza is left? Whole = 8 slices Part left = 4 Ratio: Part = 4 = 1= 0.5 = 50% Whole 8 2
5. Use Proportions Set your part over whole ratio equal to “p” over 100. Part = p Whole 100 Pizza Example: 4 = p 8 100
6. Solving Proportions 4 = p 8 100 Cross multiply: 4x 100 = 8 xp 400 = 8p Solve for p 400 = p 8 P = 50%
7. Example: What percent of 162 is 90? Part = 90 Whole = 162 90 = p 162 100 Cross Multiply 90 x 100 = 162 xp 900 = 162p Solve for p 900 = p 162 P= 56%
9. Your Turn Cont. Part= 24 Whole = 60 24 = p 60 100 2400 = 60p p = 40%
10. Take the Quiz Go to Quiz Star: http://quizstar.4teachers.org/indexs.jsp Login: edtech521 Password: edtech521
11. Virtual Field Trip Go to: http://edtech2.boisestate.edu/kochc/521/indian_education/home.html Study about the tribes in Montana. Answer the three questions on each tribe in a Google doc Draw the tribe’s reservations in the map.