-70.65% is the change from 644 to 189
Calculation steps:
[( 189 - 644 ) ÷ 644] x 100 = -70.65%
Formula
Percentage change = [(189 - 644) / 644] x 100
Subtract the new number by the original number
189 - 644 = -455
-455 ÷ 644 = -0.7065217391304348
-0.7065217391304348 x 100 = -70.65%