-96.52% is the change from 431 to 15
Calculation steps:
[( 15 - 431 ) ÷ 431] x 100 = -96.52%
Formula
Percentage change = [(15 - 431) / 431] x 100
Subtract the new number by the original number
15 - 431 = -416
-416 ÷ 431 = -0.9651972157772621
-0.9651972157772621 x 100 = -96.52%