-57.73% is the change from 511 to 216
Calculation steps:
[( 216 - 511 ) ÷ 511] x 100 = -57.73%
Formula
Percentage change = [(216 - 511) / 511] x 100
Subtract the new number by the original number
216 - 511 = -295
-295 ÷ 511 = -0.5772994129158513
-0.5772994129158513 x 100 = -57.73%