-16.8% is the change from 512 to 426
Calculation steps:
[( 426 - 512 ) ÷ 512] x 100 = -16.8%
Formula
Percentage change = [(426 - 512) / 512] x 100
Subtract the new number by the original number
426 - 512 = -86
-86 ÷ 512 = -0.16796875
-0.16796875 x 100 = -16.8%