-97.98% is the change from 495 to 10
Calculation steps:
[( 10 - 495 ) ÷ 495] x 100 = -97.98%
Formula
Percentage change = [(10 - 495) / 495] x 100
Subtract the new number by the original number
10 - 495 = -485
-485 ÷ 495 = -0.9797979797979798
-0.9797979797979798 x 100 = -97.98%