-83.36% is the change from 613 to 102
Calculation steps:
[( 102 - 613 ) ÷ 613] x 100 = -83.36%
Formula
Percentage change = [(102 - 613) / 613] x 100
Subtract the new number by the original number
102 - 613 = -511
-511 ÷ 613 = -0.833605220228385
-0.833605220228385 x 100 = -83.36%