-37.35% is the change from 506 to 317
Calculation steps:
[( 317 - 506 ) ÷ 506] x 100 = -37.35%
Formula
Percentage change = [(317 - 506) / 506] x 100
Subtract the new number by the original number
317 - 506 = -189
-189 ÷ 506 = -0.37351778656126483
-0.37351778656126483 x 100 = -37.35%