-83.28% is the change from 610 to 102
Calculation steps:
[( 102 - 610 ) ÷ 610] x 100 = -83.28%
Formula
Percentage change = [(102 - 610) / 610] x 100
Subtract the new number by the original number
102 - 610 = -508
-508 ÷ 610 = -0.8327868852459016
-0.8327868852459016 x 100 = -83.28%