-21.18% is the change from 85 to 67
Calculation steps:
[( 67 - 85 ) ÷ 85] x 100 = -21.18%
Formula
Percentage change = [(67 - 85) / 85] x 100
Subtract the new number by the original number
67 - 85 = -18
-18 ÷ 85 = -0.21176470588235294
-0.21176470588235294 x 100 = -21.18%