-71.36% is the change from 660 to 189
Calculation steps:
[( 189 - 660 ) ÷ 660] x 100 = -71.36%
Formula
Percentage change = [(189 - 660) / 660] x 100
Subtract the new number by the original number
189 - 660 = -471
-471 ÷ 660 = -0.7136363636363636
-0.7136363636363636 x 100 = -71.36%