-72.45% is the change from 646 to 178
Calculation steps:
[( 178 - 646 ) ÷ 646] x 100 = -72.45%
Formula
Percentage change = [(178 - 646) / 646] x 100
Subtract the new number by the original number
178 - 646 = -468
-468 ÷ 646 = -0.7244582043343654
-0.7244582043343654 x 100 = -72.45%