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Korvikt [17]
4 years ago
15

40% of the people attending the movie were adults if 20 adults attended the movie then how many people attended the movie (use a

ratio box)
Mathematics
1 answer:
podryga [215]4 years ago
6 0

Answer:

50

Step-by-step explanation:

Let x represent the number of people that attended the movie.

And y the number of adults that attended the movie

Given;

Percent of adults that attended the movie = 40%

Number of adults that attended the movie y = 20

So,

40% of those that attended the movie area adults.

y = 40% of x

y = 40/100 × x

y = 0.4x

(Ratio of y to x is 4:10 or 0.4)

Making x the subject of formula;

x = y/0.4

Substituting the value of y given;

x = 20/0.4

x = 50

Therefore, 50 people attended the movie.

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Step-by-step explanation:

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Step by step solution :

Step  1  :

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Step  2  :

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Equation at the end of step  2  :

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Step  3  :

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Equation at the end of step  3  :

   4         1     2n

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One solution was found :

                  n = 1/2 = 0.500

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