Question 729992
<pre>
There ar children and adults at an art exhibit. There are 15 children, and this is 12% of the total number of people at the exbibit.
How many adults are at the exhibit?
F. 80
G. 110
H. 125
I. 180

Since 15 children represent 12% of the people at the exhibit, then number of adults represent 100% - 12% (1 - .12) = 88%, or .88
With A being the number of adults, we then get the following PROPORTION: {{{15/A = .12/.88}}}
                                                                        .12A = 15(.88) ----- Cross-multiplying
<font color = red><font size = 4><b>Number of adults</font></font></b>, or {{{highlight_green(matrix(1,11, A, "=", 15(.88)/.12, "=", 5cross(15)(.88)/.04(cross(.12)), "=", 5((.88)/.04), "=", 5(22), "=", highlight(matrix(1,3, 110, "(CHOICE", "G.)"))))}}}</pre>