-91.53% is the change from 531 to 45
Calculation steps:
[( 45 - 531 ) ÷ 531] x 100 = -91.53%
Formula
Percentage change = [(45 - 531) / 531] x 100
Subtract the new number by the original number
45 - 531 = -486
-486 ÷ 531 = -0.9152542372881356
-0.9152542372881356 x 100 = -91.53%