-73.14% is the change from 644 to 173
Calculation steps:
[( 173 - 644 ) ÷ 644] x 100 = -73.14%
Formula
Percentage change = [(173 - 644) / 644] x 100
Subtract the new number by the original number
173 - 644 = -471
-471 ÷ 644 = -0.7313664596273292
-0.7313664596273292 x 100 = -73.14%