-97.58% is the change from 495 to 12
Calculation steps:
[( 12 - 495 ) ÷ 495] x 100 = -97.58%
Formula
Percentage change = [(12 - 495) / 495] x 100
Subtract the new number by the original number
12 - 495 = -483
-483 ÷ 495 = -0.9757575757575757
-0.9757575757575757 x 100 = -97.58%