-17.51% is the change from 611 to 504
Calculation steps:
[( 504 - 611 ) ÷ 611] x 100 = -17.51%
Formula
Percentage change = [(504 - 611) / 611] x 100
Subtract the new number by the original number
504 - 611 = -107
-107 ÷ 611 = -0.1751227495908347
-0.1751227495908347 x 100 = -17.51%