-71.12% is the change from 644 to 186
Calculation steps:
[( 186 - 644 ) ÷ 644] x 100 = -71.12%
Formula
Percentage change = [(186 - 644) / 644] x 100
Subtract the new number by the original number
186 - 644 = -458
-458 ÷ 644 = -0.7111801242236024
-0.7111801242236024 x 100 = -71.12%