-48.3% is the change from 501 to 259
Calculation steps:
[( 259 - 501 ) ÷ 501] x 100 = -48.3%
Formula
Percentage change = [(259 - 501) / 501] x 100
Subtract the new number by the original number
259 - 501 = -242
-242 ÷ 501 = -0.48303393213572854
-0.48303393213572854 x 100 = -48.3%