-62.21% is the change from 643 to 243
Calculation steps:
[( 243 - 643 ) ÷ 643] x 100 = -62.21%
Formula
Percentage change = [(243 - 643) / 643] x 100
Subtract the new number by the original number
243 - 643 = -400
-400 ÷ 643 = -0.6220839813374806
-0.6220839813374806 x 100 = -62.21%