-97.64% is the change from 508 to 12
Calculation steps:
[( 12 - 508 ) ÷ 508] x 100 = -97.64%
Formula
Percentage change = [(12 - 508) / 508] x 100
Subtract the new number by the original number
12 - 508 = -496
-496 ÷ 508 = -0.9763779527559056
-0.9763779527559056 x 100 = -97.64%