Percent Decrease.  TODAY’S STANDARD: TODAY’S STANDARD:  CCSS.MATH.CONTENT.7.RP.A.3 Use proportional relationships to solve multistep ratio and percent.

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Presentation transcript:

Percent Decrease

 TODAY’S STANDARD: TODAY’S STANDARD:  CCSS.MATH.CONTENT.7.RP.A.3 Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error. CCSS.MATH.CONTENT.7.RP.A.3  Your goal is to demonstrate your mastery of this topic by solving at least 3 out of 4 (75%) of percent decrease problems correctly on the exit ticket at the end of the period.

Percent Decrease  This topic builds on the converting percents to decimals and finding the percent of a number lessons that we did last week.  You will need to be able to calculate percent decreases in order to do well in an upcoming unit on shapes because their sides and area often get decreased by a percentage.  In future math classes, you will examine data and use percent decrease to draw conclusions, such as with slope on a graph.

 What are we learning about today?  How will you prove that you understand this topic?

 Real-life situations involve percent decreases include coupons and sales.  You must be saving a percentage, not a set amount. A flat $5 off would not be a percent decrease but 15% off would.

 To find the savings/decrease only, just find the percent of the number.  To find the sale/discounted/final price, find the percent of the number and subtract it from the original number.

 Example: 10% sale on a $6.80 item  The amount of the savings is 10% of $ % = 0.10 = × 0.1 $0.680 = $0.68  The final cost is the original cost - savings $ $0.68 $6.12

Independent Station  The Independent Station instructions are a little bit more complicated than normal today, so make sure you pay close attention.  I will be calling on random students using the equity cards to repeat the directions.

Independent Station Step 1: Engrade  What do you need to be careful of in Engrade?  Leave your results open and use a new tab.

Independent Station Step 2: Google Form  In a new tab, open Step 2, the Google Form. It will help you reflect on which topics you need the most help with.

Independent Station Step 3: Study  Back on my webpage, there are 4 links  You only need to read the link of the topic that you scored the lowest on.

Independent Station Steps 4-6  If you have finished Steps 1-3 and it is not yet time to rotate, continue on with Steps 4-6 on my page.  This means I should NOT see anyone on hoodamath, coolmathgames, or using any other app. iPad violations will be issued to anyone not using their iPads for the stated activities.

Independent Station  After you finish the Engrade problems, what do you need to be careful to do?  What do you do after the Engrade problems?  In step 3, there links to 4 different topics. Which one are you supposed to read?

Independent Station  After you finish the Engrade problems, what do you need to be careful to do? Leave the results page open and use a new tab.  What do you do after the Engrade problems? Fill out the Google Form Reflection.  In step 3, there links to 4 different topics. Which one are you supposed to read? The topic that you scored the lowest on.