At Sidney's Hats, 84% of the 50 hats are baseball caps. How many baseball caps are there?

42 baseball caps

Since 84% = 84/100 , and 50 is 1/2 of 100 we can think of 84% of 50 being half of the value of 84% of 100. So 84/2 = 42

There are other ways of solving such as multiplying 50 by 0.84, however I believe that how I solved it was the easiest way for this specific problem :)

Equatorial triangle and obtuce angle