-58.51% is the change from 511 to 212
Calculation steps:
[( 212 - 511 ) ÷ 511] x 100 = -58.51%
Formula
Percentage change = [(212 - 511) / 511] x 100
Subtract the new number by the original number
212 - 511 = -299
-299 ÷ 511 = -0.5851272015655578
-0.5851272015655578 x 100 = -58.51%