-70.28% is the change from 646 to 192
Calculation steps:
[( 192 - 646 ) ÷ 646] x 100 = -70.28%
Formula
Percentage change = [(192 - 646) / 646] x 100
Subtract the new number by the original number
192 - 646 = -454
-454 ÷ 646 = -0.7027863777089783
-0.7027863777089783 x 100 = -70.28%