-18% is the change from 511 to 419
Calculation steps:
[( 419 - 511 ) ÷ 511] x 100 = -18%
Formula
Percentage change = [(419 - 511) / 511] x 100
Subtract the new number by the original number
419 - 511 = -92
-92 ÷ 511 = -0.18003913894324852
-0.18003913894324852 x 100 = -18%