-30.13% is the change from 458 to 320
Calculation steps:
[( 320 - 458 ) ÷ 458] x 100 = -30.13%
Formula
Percentage change = [(320 - 458) / 458] x 100
Subtract the new number by the original number
320 - 458 = -138
-138 ÷ 458 = -0.30131004366812225
-0.30131004366812225 x 100 = -30.13%