-88.96% is the change from 661 to 73
Calculation steps:
[( 73 - 661 ) ÷ 661] x 100 = -88.96%
Formula
Percentage change = [(73 - 661) / 661] x 100
Subtract the new number by the original number
73 - 661 = -588
-588 ÷ 661 = -0.8895612708018155
-0.8895612708018155 x 100 = -88.96%