-72.14% is the change from 646 to 180
Calculation steps:
[( 180 - 646 ) ÷ 646] x 100 = -72.14%
Formula
Percentage change = [(180 - 646) / 646] x 100
Subtract the new number by the original number
180 - 646 = -466
-466 ÷ 646 = -0.7213622291021672
-0.7213622291021672 x 100 = -72.14%