-97.63% is the change from 506 to 12
Calculation steps:
[( 12 - 506 ) ÷ 506] x 100 = -97.63%
Formula
Percentage change = [(12 - 506) / 506] x 100
Subtract the new number by the original number
12 - 506 = -494
-494 ÷ 506 = -0.9762845849802372
-0.9762845849802372 x 100 = -97.63%