-84.2% is the change from 538 to 85
Calculation steps:
[( 85 - 538 ) ÷ 538] x 100 = -84.2%
Formula
Percentage change = [(85 - 538) / 538] x 100
Subtract the new number by the original number
85 - 538 = -453
-453 ÷ 538 = -0.8420074349442379
-0.8420074349442379 x 100 = -84.2%