-85.55% is the change from 512 to 74
Calculation steps:
[( 74 - 512 ) ÷ 512] x 100 = -85.55%
Formula
Percentage change = [(74 - 512) / 512] x 100
Subtract the new number by the original number
74 - 512 = -438
-438 ÷ 512 = -0.85546875
-0.85546875 x 100 = -85.55%