-68.12% is the change from 505 to 161
Calculation steps:
[( 161 - 505 ) ÷ 505] x 100 = -68.12%
Formula
Percentage change = [(161 - 505) / 505] x 100
Subtract the new number by the original number
161 - 505 = -344
-344 ÷ 505 = -0.6811881188118812
-0.6811881188118812 x 100 = -68.12%