-70.45% is the change from 643 to 190
Calculation steps:
[( 190 - 643 ) ÷ 643] x 100 = -70.45%
Formula
Percentage change = [(190 - 643) / 643] x 100
Subtract the new number by the original number
190 - 643 = -453
-453 ÷ 643 = -0.7045101088646968
-0.7045101088646968 x 100 = -70.45%