-68.18% is the change from 506 to 161
Calculation steps:
[( 161 - 506 ) ÷ 506] x 100 = -68.18%
Formula
Percentage change = [(161 - 506) / 506] x 100
Subtract the new number by the original number
161 - 506 = -345
-345 ÷ 506 = -0.6818181818181818
-0.6818181818181818 x 100 = -68.18%