-74.77% is the change from 646 to 163
Calculation steps:
[( 163 - 646 ) ÷ 646] x 100 = -74.77%
Formula
Percentage change = [(163 - 646) / 646] x 100
Subtract the new number by the original number
163 - 646 = -483
-483 ÷ 646 = -0.7476780185758514
-0.7476780185758514 x 100 = -74.77%