-57.2% is the change from 500 to 214
Calculation steps:
[( 214 - 500 ) ÷ 500] x 100 = -57.2%
Formula
Percentage change = [(214 - 500) / 500] x 100
Subtract the new number by the original number
214 - 500 = -286
-286 ÷ 500 = -0.572
-0.572 x 100 = -57.2%