-75.19% is the change from 661 to 164
Calculation steps:
[( 164 - 661 ) ÷ 661] x 100 = -75.19%
Formula
Percentage change = [(164 - 661) / 661] x 100
Subtract the new number by the original number
164 - 661 = -497
-497 ÷ 661 = -0.7518910741301059
-0.7518910741301059 x 100 = -75.19%