-71.02% is the change from 666 to 193
Calculation steps:
[( 193 - 666 ) ÷ 666] x 100 = -71.02%
Formula
Percentage change = [(193 - 666) / 666] x 100
Subtract the new number by the original number
193 - 666 = -473
-473 ÷ 666 = -0.7102102102102102
-0.7102102102102102 x 100 = -71.02%