-57.11% is the change from 506 to 217
Calculation steps:
[( 217 - 506 ) ÷ 506] x 100 = -57.11%
Formula
Percentage change = [(217 - 506) / 506] x 100
Subtract the new number by the original number
217 - 506 = -289
-289 ÷ 506 = -0.5711462450592886
-0.5711462450592886 x 100 = -57.11%