-90.85% is the change from 590 to 54
Calculation steps:
[( 54 - 590 ) ÷ 590] x 100 = -90.85%
Formula
Percentage change = [(54 - 590) / 590] x 100
Subtract the new number by the original number
54 - 590 = -536
-536 ÷ 590 = -0.9084745762711864
-0.9084745762711864 x 100 = -90.85%