-83.53% is the change from 516 to 85
Calculation steps:
[( 85 - 516 ) ÷ 516] x 100 = -83.53%
Formula
Percentage change = [(85 - 516) / 516] x 100
Subtract the new number by the original number
85 - 516 = -431
-431 ÷ 516 = -0.8352713178294574
-0.8352713178294574 x 100 = -83.53%