-78.37% is the change from 393 to 85
Calculation steps:
[( 85 - 393 ) ÷ 393] x 100 = -78.37%
Formula
Percentage change = [(85 - 393) / 393] x 100
Subtract the new number by the original number
85 - 393 = -308
-308 ÷ 393 = -0.7837150127226463
-0.7837150127226463 x 100 = -78.37%