-85.93% is the change from 590 to 83
Calculation steps:
[( 83 - 590 ) ÷ 590] x 100 = -85.93%
Formula
Percentage change = [(83 - 590) / 590] x 100
Subtract the new number by the original number
83 - 590 = -507
-507 ÷ 590 = -0.8593220338983051
-0.8593220338983051 x 100 = -85.93%