-18% is the change from 811 to 665
Calculation steps:
[( 665 - 811 ) ÷ 811] x 100 = -18%
Formula
Percentage change = [(665 - 811) / 811] x 100
Subtract the new number by the original number
665 - 811 = -146
-146 ÷ 811 = -0.18002466091245375
-0.18002466091245375 x 100 = -18%