15% of the people who went to the movies bought popcorn. if 180 people went to the movies, how many did not buy popcorn?

180 x 15%

180 × .15= 27

27 people bought popcorn.

Hello there,
100% = 180
1% = 180 / 100
      = 1.8
15% = 1.8 x 15%
        =27
People who did not buy popcorn= 180 - 27
                                                    = 153

Hope this helps :))

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Do you need with the x value for the minimum? its always between the two intercepts for a parabola