-19.14% is the change from 512 to 414
Calculation steps:
[( 414 - 512 ) ÷ 512] x 100 = -19.14%
Formula
Percentage change = [(414 - 512) / 512] x 100
Subtract the new number by the original number
414 - 512 = -98
-98 ÷ 512 = -0.19140625
-0.19140625 x 100 = -19.14%