-58.41% is the change from 517 to 215
Calculation steps:
[( 215 - 517 ) ÷ 517] x 100 = -58.41%
Formula
Percentage change = [(215 - 517) / 517] x 100
Subtract the new number by the original number
215 - 517 = -302
-302 ÷ 517 = -0.5841392649903289
-0.5841392649903289 x 100 = -58.41%