To solve this, we begin by finding how many less visitors there were. We do this by subtracting 1,349 from 1,525. 1,525 - 1,349 = 176.
Now, we find what percent of 1,525 176 is. We do this by dividing 176 by 1,525 and multiplying the result by 100 to get a percent. 176/1,525 *100 = 11.54%, so the percent decrease was 11.54%.