"yes, except

20/36 / 21/x
x= 189/5 = 37.8
seems to have a typo, no original equation"

There was a typo, it should have been:

20/36 = 21/x
x= 189/5 = 37.8

So is this correct?

yes,

except after taking all that time to type out a lengthy post, and then repost it,
could you not have pulled out your calculator
and found 20/36 = .555555 and then
21/37.8 = .555555 ???

I did that. I was just looking for a confirmation that my answer was correct.

To determine if the given equation is correct, we can first rewrite it properly:

20/36 = 21/x

Now, let's solve for x.

To do so, we can cross-multiply:

20 * x = 36 * 21

Now, divide both sides of the equation by 20 to isolate x:

x = (36 * 21) / 20

Calculating this expression gives us:

x = 756 / 20

Simplifying the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 4, we get:

x = 189 / 5

So, the correct value of x is indeed 189/5 or 37.8.

Therefore, the statement "x = 189/5 = 37.8" is correct, and there was a typo in the original equation.