-62.3% is the change from 512 to 193
Calculation steps:
[( 193 - 512 ) ÷ 512] x 100 = -62.3%
Formula
Percentage change = [(193 - 512) / 512] x 100
Subtract the new number by the original number
193 - 512 = -319
-319 ÷ 512 = -0.623046875
-0.623046875 x 100 = -62.3%