-31.4% is the change from 637 to 437
Calculation steps:
[( 437 - 637 ) ÷ 637] x 100 = -31.4%
Formula
Percentage change = [(437 - 637) / 637] x 100
Subtract the new number by the original number
437 - 637 = -200
-200 ÷ 637 = -0.3139717425431711
-0.3139717425431711 x 100 = -31.4%