-23.44% is the change from 512 to 392
Calculation steps:
[( 392 - 512 ) ÷ 512] x 100 = -23.44%
Formula
Percentage change = [(392 - 512) / 512] x 100
Subtract the new number by the original number
392 - 512 = -120
-120 ÷ 512 = -0.234375
-0.234375 x 100 = -23.44%