-48.47% is the change from 621 to 320
Calculation steps:
[( 320 - 621 ) ÷ 621] x 100 = -48.47%
Formula
Percentage change = [(320 - 621) / 621] x 100
Subtract the new number by the original number
320 - 621 = -301
-301 ÷ 621 = -0.48470209339774556
-0.48470209339774556 x 100 = -48.47%