-32.35% is the change from 646 to 437
Calculation steps:
[( 437 - 646 ) ÷ 646] x 100 = -32.35%
Formula
Percentage change = [(437 - 646) / 646] x 100
Subtract the new number by the original number
437 - 646 = -209
-209 ÷ 646 = -0.3235294117647059
-0.3235294117647059 x 100 = -32.35%