It seems that you have missed the necessary details to complete the given question above so I had to look for it. Anyway here is the answer. The decrease is from 6000 to 3710. This means, the decrease is 2,290. Now, in order for us to find what percent is 2,290 of 6000, we simply divide 2,290 by 6000 and multiply this by 100 and the answer would be 38.17. So the decrease is 38.17%. Hope this helps.
