-70.14% is the change from 643 to 192
Calculation steps:
[( 192 - 643 ) ÷ 643] x 100 = -70.14%
Formula
Percentage change = [(192 - 643) / 643] x 100
Subtract the new number by the original number
192 - 643 = -451
-451 ÷ 643 = -0.7013996889580093
-0.7013996889580093 x 100 = -70.14%