-75.04% is the change from 661 to 165
Calculation steps:
[( 165 - 661 ) ÷ 661] x 100 = -75.04%
Formula
Percentage change = [(165 - 661) / 661] x 100
Subtract the new number by the original number
165 - 661 = -496
-496 ÷ 661 = -0.7503782148260212
-0.7503782148260212 x 100 = -75.04%