-96.95% is the change from 492 to 15
Calculation steps:
[( 15 - 492 ) ÷ 492] x 100 = -96.95%
Formula
Percentage change = [(15 - 492) / 492] x 100
Subtract the new number by the original number
15 - 492 = -477
-477 ÷ 492 = -0.9695121951219512
-0.9695121951219512 x 100 = -96.95%