-73.72% is the change from 643 to 169
Calculation steps:
[( 169 - 643 ) ÷ 643] x 100 = -73.72%
Formula
Percentage change = [(169 - 643) / 643] x 100
Subtract the new number by the original number
169 - 643 = -474
-474 ÷ 643 = -0.7371695178849145
-0.7371695178849145 x 100 = -73.72%