-95.82% is the change from 646 to 27
Calculation steps:
[( 27 - 646 ) ÷ 646] x 100 = -95.82%
Formula
Percentage change = [(27 - 646) / 646] x 100
Subtract the new number by the original number
27 - 646 = -619
-619 ÷ 646 = -0.958204334365325
-0.958204334365325 x 100 = -95.82%