-81.88% is the change from 320 to 58
Calculation steps:
[( 58 - 320 ) ÷ 320] x 100 = -81.88%
Formula
Percentage change = [(58 - 320) / 320] x 100
Subtract the new number by the original number
58 - 320 = -262
-262 ÷ 320 = -0.81875
-0.81875 x 100 = -81.88%