-78.86% is the change from 402 to 85
Calculation steps:
[( 85 - 402 ) ÷ 402] x 100 = -78.86%
Formula
Percentage change = [(85 - 402) / 402] x 100
Subtract the new number by the original number
85 - 402 = -317
-317 ÷ 402 = -0.7885572139303483
-0.7885572139303483 x 100 = -78.86%