-32.04% is the change from 643 to 437
Calculation steps:
[( 437 - 643 ) ÷ 643] x 100 = -32.04%
Formula
Percentage change = [(437 - 643) / 643] x 100
Subtract the new number by the original number
437 - 643 = -206
-206 ÷ 643 = -0.3203732503888025
-0.3203732503888025 x 100 = -32.04%