-70.8% is the change from 661 to 193
Calculation steps:
[( 193 - 661 ) ÷ 661] x 100 = -70.8%
Formula
Percentage change = [(193 - 661) / 661] x 100
Subtract the new number by the original number
193 - 661 = -468
-468 ÷ 661 = -0.708018154311649
-0.708018154311649 x 100 = -70.8%