-97.6% is the change from 499 to 12
Calculation steps:
[( 12 - 499 ) ÷ 499] x 100 = -97.6%
Formula
Percentage change = [(12 - 499) / 499] x 100
Subtract the new number by the original number
12 - 499 = -487
-487 ÷ 499 = -0.9759519038076152
-0.9759519038076152 x 100 = -97.6%