-52.54% is the change from 512 to 243
Calculation steps:
[( 243 - 512 ) ÷ 512] x 100 = -52.54%
Formula
Percentage change = [(243 - 512) / 512] x 100
Subtract the new number by the original number
243 - 512 = -269
-269 ÷ 512 = -0.525390625
-0.525390625 x 100 = -52.54%