-90.71% is the change from 646 to 60
Calculation steps:
[( 60 - 646 ) ÷ 646] x 100 = -90.71%
Formula
Percentage change = [(60 - 646) / 646] x 100
Subtract the new number by the original number
60 - 646 = -586
-586 ÷ 646 = -0.9071207430340558
-0.9071207430340558 x 100 = -90.71%