-32.49% is the change from 511 to 345
Calculation steps:
[( 345 - 511 ) ÷ 511] x 100 = -32.49%
Formula
Percentage change = [(345 - 511) / 511] x 100
Subtract the new number by the original number
345 - 511 = -166
-166 ÷ 511 = -0.324853228962818
-0.324853228962818 x 100 = -32.49%