-84.4% is the change from 545 to 85
Calculation steps:
[( 85 - 545 ) ÷ 545] x 100 = -84.4%
Formula
Percentage change = [(85 - 545) / 545] x 100
Subtract the new number by the original number
85 - 545 = -460
-460 ÷ 545 = -0.8440366972477065
-0.8440366972477065 x 100 = -84.4%