-71.36% is the change from 646 to 185
Calculation steps:
[( 185 - 646 ) ÷ 646] x 100 = -71.36%
Formula
Percentage change = [(185 - 646) / 646] x 100
Subtract the new number by the original number
185 - 646 = -461
-461 ÷ 646 = -0.7136222910216719
-0.7136222910216719 x 100 = -71.36%