-55.83% is the change from 643 to 284
Calculation steps:
[( 284 - 643 ) ÷ 643] x 100 = -55.83%
Formula
Percentage change = [(284 - 643) / 643] x 100
Subtract the new number by the original number
284 - 643 = -359
-359 ÷ 643 = -0.5583203732503889
-0.5583203732503889 x 100 = -55.83%