-36.55% is the change from 643 to 408
Calculation steps:
[( 408 - 643 ) ÷ 643] x 100 = -36.55%
Formula
Percentage change = [(408 - 643) / 643] x 100
Subtract the new number by the original number
408 - 643 = -235
-235 ÷ 643 = -0.3654743390357698
-0.3654743390357698 x 100 = -36.55%