-18% is the change from 611 to 501
Calculation steps:
[( 501 - 611 ) ÷ 611] x 100 = -18%
Formula
Percentage change = [(501 - 611) / 611] x 100
Subtract the new number by the original number
501 - 611 = -110
-110 ÷ 611 = -0.18003273322422259
-0.18003273322422259 x 100 = -18%