新编文档-MoreonSolvingPercentProblems更多的百分之问题解决-精品文档

1、Percent Word ProblemsWarm UpWhat is 70% of 258?x _ 70258_i00> 180.6216 is what percent of 360?216_ p360100> 60%16% of what number is 80?80 _ 16x 100> 15001A school has a total enrollment of 800 students. : Twenty percent of the students play a sport How many do not play a sport? If 20% play

2、 a sport then 80% do NOT play a sport 80% of 800 = (.80)(800) = 640In other words, what is 80% of 800?X 80800 10016401There are 200 freshmen in a high school. 30% of them take Spanish How many freshmen are enrolled in Spanish? 200(0.3) = 60In other words, what is 30% of 200?x _ 30 200_ 100An algebra

3、 class contains 30 students. Forty percent of the students in the class are girls. How many boys are in the class? Hint: If 40% of the class (30)(.60) = 18 are girls then 60% of theclass are boys OR You need to find 60% ofthe 30 studentsWhat is 60% of 30?x= 18x 6030 _ 100An applianee store advertise

4、s a discount of 45% off the list price of every item Find the total cost, including a 6% sales tax, of a dishwasher that is listed at $410. First find the price with a discount: Next, find the final pricewith sales tax added: (410)(.45) = $184.50 $410-$184.50 = $225.50(.06) = $13.53$225.50 (New Pric

5、e)A football is advertised on sale at a discount of 20% off its regular price of $50. How much will Jane pay for the football if there is a 5% sales tax? Discounted Price: Final Price: ($50)(.20) = $10 DP = $50 - $10 = $40 ($40)(.05) = $2FP = $40 + $2The original marked price of a video game is $43.

6、98 During a special discount sale, the game price is reduced by 35% of the marked price Then 15% of this reduced price is taken off at the cash register. What is the final price? First Discount Price: 2nd Discount Price: ($43.98)(.35) = $15.39 ($28.59)(.15) = $4.29 1st DP = $43.98 $15.39 = $28.59Fin

7、al DP=2g9 -$4.29 =(24.30Percent of Increase or DecreasePercent of Increase =Arount c£InaeaseQrinal ArourlPercent of Decrease =cfTDtoeaseQigjnal rnourtLast week Dora earned $40 working part time. This week she earned $30. What is the percent of decrease?The high school football team won 19 games this season Last year the team won 15 games The increase in wins is what percent of the wins last year?In the dia