-65.94% is the change from 643 to 219
Calculation steps:
[( 219 - 643 ) ÷ 643] x 100 = -65.94%
Formula
Percentage change = [(219 - 643) / 643] x 100
Subtract the new number by the original number
219 - 643 = -424
-424 ÷ 643 = -0.6594090202177294
-0.6594090202177294 x 100 = -65.94%