19 men in a chorus sing baritone. they are 37% of the chorus. how many are in the chorus

Number of people in the chorus singing baritone = 19
Percentage of men in the chorus singing baritone = 37%
Let us assume the total number of people in the chorus is = x
Then
(37/100) * x = 19
37x = 19 * 100
37x = 1900
x = 1900/37
   =   51.35
As the number of people cannot be in fraction, so we can assume that there are either 51 or 52 people in the chorus group.I hope the procedure for getting to the answer is easy for you to understand.

If you divide 0.1 and 0.6 you wii get 0.166666 which rounds to .167 which is answer b