-33.79% is the change from 506 to 335
Calculation steps:
[( 335 - 506 ) ÷ 506] x 100 = -33.79%
Formula
Percentage change = [(335 - 506) / 506] x 100
Subtract the new number by the original number
335 - 506 = -171
-171 ÷ 506 = -0.33794466403162055
-0.33794466403162055 x 100 = -33.79%