-86.23% is the change from 610 to 84
Calculation steps:
[( 84 - 610 ) ÷ 610] x 100 = -86.23%
Formula
Percentage change = [(84 - 610) / 610] x 100
Subtract the new number by the original number
84 - 610 = -526
-526 ÷ 610 = -0.8622950819672132
-0.8622950819672132 x 100 = -86.23%