-58.04% is the change from 510 to 214
Calculation steps:
[( 214 - 510 ) ÷ 510] x 100 = -58.04%
Formula
Percentage change = [(214 - 510) / 510] x 100
Subtract the new number by the original number
214 - 510 = -296
-296 ÷ 510 = -0.5803921568627451
-0.5803921568627451 x 100 = -58.04%