-83.96% is the change from 661 to 106
Calculation steps:
[( 106 - 661 ) ÷ 661] x 100 = -83.96%
Formula
Percentage change = [(106 - 661) / 661] x 100
Subtract the new number by the original number
106 - 661 = -555
-555 ÷ 661 = -0.8396369137670197
-0.8396369137670197 x 100 = -83.96%