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Natasha2012 [34]
3 years ago
9

Please Help!! Show all work pls! #15

Mathematics
2 answers:
vovikov84 [41]3 years ago
8 0
You first have to know the total number of responses: 82+76+42= 200
then you set up a proportion: %/100 = part/whole (and whichever thing you’re trying to solve for will be x)
so for this problem: x/100 = 42/200 (x is what you’re solving for: you’re trying to find the percent of people that prefer strawberry ice cream out of the 200 people surveyed)
then: cross multiply
i like to start with the x first so:
200 • x = 200x
and
42 • 100 = 4200
then finally put these together to make an algebraic equation: 200x = 4200
solve from there:
4200 divided by 200 (because you want x by itself) is 21 so you’re left with:
x = 21
now remember how we used x to represent the percent out of 100 on our proportion? this means that 21% of people (out of the 200) prefer strawberry ice cream
hope this helps!
MrRissso [65]3 years ago
7 0

Step-by-step explanation:

82 + 76 + 42 = 200

42 out of 200 hmmm

200 / 2 = 100

42 / 2 = 21

21 out of 100 = 42 out of 200

=

21%

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