-31.55% is the change from 637 to 436
Calculation steps:
[( 436 - 637 ) ÷ 637] x 100 = -31.55%
Formula
Percentage change = [(436 - 637) / 637] x 100
Subtract the new number by the original number
436 - 637 = -201
-201 ÷ 637 = -0.315541601255887
-0.315541601255887 x 100 = -31.55%