-71.27% is the change from 644 to 185
Calculation steps:
[( 185 - 644 ) ÷ 644] x 100 = -71.27%
Formula
Percentage change = [(185 - 644) / 644] x 100
Subtract the new number by the original number
185 - 644 = -459
-459 ÷ 644 = -0.7127329192546584
-0.7127329192546584 x 100 = -71.27%