-64.84% is the change from 910 to 320
Calculation steps:
[( 320 - 910 ) ÷ 910] x 100 = -64.84%
Formula
Percentage change = [(320 - 910) / 910] x 100
Subtract the new number by the original number
320 - 910 = -590
-590 ÷ 910 = -0.6483516483516484
-0.6483516483516484 x 100 = -64.84%