Percent of a Number Test 1
 7th Grade Lessonfor TuesdayNovember 22nd In this lesson, you will continue to workon proportions and percents.In particular, you'll be calculating thepercent of a number First, it's important to understand how calculatinga percent of a number is just like calculating aproportion. For example, 40% of 200We know that 40% is the same as40 out of 100.We can write that as a fraction:40% =10040 Since...We can then compare that to an equivalentproportion.  This is like saying...If 40 out of 100 students like ham sandwiches,how many in a school of 1000 will like them?To solve this, we'd write a proportion:x =1004040 x 100010040% ==1000100= 400x40 Instead of saying 40 out of 100, we could just say40%. If 40% of the students like ham sandwiches, howmany students out of 1000 will like them?This would be the same proportion:x =1004040 x 1000100=1000= 400x Let's make sure you are getting this:If 60% of the students like Turkey sandwiches,how many out of 800 will like them?Fill in the missing spaces and use your calculatorto find the final answer.=x= This is the last slide for Part I.  If you did thiscorrectly, you will receive a 100% on this portion.If there is a mistake, it will require you to retakethis portion.  Please take your time and read eachslide carefully, so that you'll be ready to go onto the next section.
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