Question 777021
37 1/2%

Let's double it first to get rid of the 1/2. 2 x 37 1/2 = 75

The fraction is 75/200, as 37 1/2 % is the same as (37 1/2 ) /100

To simplify this fraction, we need to find the greatest common factor of each, and I can see it's 25. There are 3 25s in 75 and 8 25s in 200. So 3/8. 

What if that's not obvious? I see these two number are both multiples of 5, right? 

There are 75/5 is 15, 200/5 is 40, so 15/40. But both numerator and denominator are still multiples of 5, and 15/3 is 3 and 40/5 is 8. So i still simplifies to 3/8