-32.51% is the change from 646 to 436
Calculation steps:
[( 436 - 646 ) ÷ 646] x 100 = -32.51%
Formula
Percentage change = [(436 - 646) / 646] x 100
Subtract the new number by the original number
436 - 646 = -210
-210 ÷ 646 = -0.32507739938080493
-0.32507739938080493 x 100 = -32.51%