-85.95% is the change from 612 to 86
Calculation steps:
[( 86 - 612 ) ÷ 612] x 100 = -85.95%
Formula
Percentage change = [(86 - 612) / 612] x 100
Subtract the new number by the original number
86 - 612 = -526
-526 ÷ 612 = -0.8594771241830066
-0.8594771241830066 x 100 = -85.95%