-57.09% is the change from 508 to 218
Calculation steps:
[( 218 - 508 ) ÷ 508] x 100 = -57.09%
Formula
Percentage change = [(218 - 508) / 508] x 100
Subtract the new number by the original number
218 - 508 = -290
-290 ÷ 508 = -0.5708661417322834
-0.5708661417322834 x 100 = -57.09%