  # Math Problems - Percent

Can you Help me solve math problem for my 6th grade brother. question is-
1. At Rober's school, 40% of the 70 sixth-grade wear eitehr glasses or contact lenses.
How many sixth grader students wear either glasses or contact lenses?
There are 7 studnets who wear glasses. Of the students who wear glasses or contact lense, what percent of students wear glasses? show work.

2. Maria has a jar of 80 M&M's. She has 16 red, 12 blue, 18 green and 34 yellow.
a. what percent of the time would you expect to randomly choose a red M&M.
b. Maria's brother, Teddy snuck into her room and ate all of her green M&M's and 7 yellow M&M's. Now what's the probability of selecting blue M&M? (write as fraction)

### Comments for Math Problems - Percent

 May 11, 2011 Math Problems - Percent by: Staff ------------------------------------------------------ Part II 2. Maria has a jar of 80 M&M's. She has 16 red, 12 blue, 18 green and 34 yellow. a. what percent of the time would you expect to randomly choose a red M&M? red = (number of red)/(total number of M&M’s) red = (16)/(80) red = 2/10 red = 0.2 ---------------------------------------- To convert the 0.2 to a percent, multiply by 100 ---------------------------------------- red = (0.2)*100 red = 20% (20% of the total number of M&M’s are red) The percent of the time would you expect to randomly choose a red M&M is also 20%. b. Maria's brother, Teddy snuck into her room and ate all of her green M&M's and 7 yellow M&M's. Now what's the probability of selecting blue M&M? (write as fraction) blue = (number of blue)/(total number of M&M’s which were not eaten) total number of M&M’s which were not eaten = 80 - 18 green eaten – 7 yellow eaten total number of M&M’s which were not eaten = 55 not eaten blue = (12 blue)/(55 not eaten) blue = (12 blue)/(55 not eaten) blue = 12/55 The probability of randomly choosing a blue M&M is also 12/55. The final answers: Problem 1 28 students wear glasses or contact lenses 25% wear glasses (25% of the total number students who wear glasses or contact lenses) Problem 2 The percent of the time would you expect to randomly choose a red M&M is 20%. The probability of randomly choosing a blue M&M is 12/55. Thanks for writing. Staff www.solving-math-problems.com

 May 11, 2011 Math Problems - Percent by: Staff Part I The question: Can you Help me solve math problem for my 6th grade brother. question is- 1. At Rober's school, 40% of the 70 sixth-grade wear eitehr glasses or contact lenses. How many sixth grader students wear either glasses or contact lenses? There are 7 studnets who wear glasses. Of the students who wear glasses or contact lense, what percent of students wear glasses? show work. 2. Maria has a jar of 80 M&M's. She has 16 red, 12 blue, 18 green and 34 yellow. a. what percent of the time would you expect to randomly choose a red M&M? b. Maria's brother, Teddy snuck into her room and ate all of her green M&M's and 7 yellow M&M's. Now what's the probability of selecting blue M&M? (write as fraction) The answer: 1. At Rober's school, 40% of the 70 sixth-grade wear either glasses or contact lenses. How many sixth grader students wear either glasses or contact lenses? How many = (total number of students) * (percent) How many = (70 students) * (40%) ---------------------------------------- Before multiplying, you must change the 40% into a fraction or a decimal Changing 40% into a fraction (the % sign means divide by 100) 40% = 40÷100 40% = 40/100 40% = 4/10 ---------------------------------------- How many = (70 students) * (4/10) How many = (70*4)/10 How many = (280)/10 How many = 28 students wear glasses or contact lenses There are 7 students who wear glasses. Of the students who wear glasses or contact lenses, what percent of students wear glasses? Show work. students = (number who wear glasses)/(total number who wear glasses & contacts) students = (7)/(28) students = 1/4 students = 0.25 ---------------------------------------- To convert the 0.25 to a percent, multiply by 100 ---------------------------------------- students = (0.25)*100 students = 25% wear glasses (25% of the total number students who wear glasses or contact lenses) ------------------------------------------------------

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