-64.68% is the change from 906 to 320
Calculation steps:
[( 320 - 906 ) ÷ 906] x 100 = -64.68%
Formula
Percentage change = [(320 - 906) / 906] x 100
Subtract the new number by the original number
320 - 906 = -586
-586 ÷ 906 = -0.6467991169977925
-0.6467991169977925 x 100 = -64.68%