7.6 Percent of Change Objective: Students will be able to find percent of change, markup/discount, percent increases/decreases. They will also be able.

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Presentation transcript:

7.6 Percent of Change Objective: Students will be able to find percent of change, markup/discount, percent increases/decreases. They will also be able to use real-life situations and be able to figure out sales tax and tip.

Information Percent of change: increase or decrease from original amount Percent increase: new amount greater than old. Percent decrease: new amount less than old. Formula: % change Difference original amount

Find the percent increase/decrease Original: 20 New: 25

Find the percent increase/decrease Original: 150 New: 25 Original: 55 New: 143

Finding Increase/decrease (option 1) Take % multiply by number Add/subtract answer by original amount Increase 45 by 20% Decrease 85 by 28%

Finding Increase/decrease-st (option 1) Increase 25 by 24% Decrease 35 by 60%

Finding Increase/decrease (option 2) Increase 28 by 25% Decrease 70 by 40% Option 2 Increase: multiply original by (100% + p%) Decrease: multiply original by (100% - p%)

Finding Increase/decrease (option 2) Increase 45 by 60% Decrease 350 by 44%

Information Markup: increase in wholesale price. Discount: decrease from original price.

Finding Markup Price: $13 Markup: 120% Bracelet: $7 Markup: 100%

Find Markup-st Price: $30 Markup: 125% Price: $120 Markup: 50%

Find Sale Price Jeans: $42 Discount: 20% Price: $40 Discount: 20%

Find Sale Price-st Cost of going to zoo is $15 but will be discounted 20%. Find discount. Price: $40 Discount: 25%

Tax, Tip To find: Mulitply original by % Add to total Find the total cost if meal was $20 with 6% tax and you leave 10% tip.

Tax, Tip-st Food bill: $12 tax: 5% Meal: $25 tax: 5% tip: 10%

Wrap up Questions/Comments Hw: worksheet