-87.06% is the change from 657 to 85
Calculation steps:
[( 85 - 657 ) ÷ 657] x 100 = -87.06%
Formula
Percentage change = [(85 - 657) / 657] x 100
Subtract the new number by the original number
85 - 657 = -572
-572 ÷ 657 = -0.8706240487062404
-0.8706240487062404 x 100 = -87.06%