-50.7% is the change from 501 to 247
Calculation steps:
[( 247 - 501 ) ÷ 501] x 100 = -50.7%
Formula
Percentage change = [(247 - 501) / 501] x 100
Subtract the new number by the original number
247 - 501 = -254
-254 ÷ 501 = -0.5069860279441117
-0.5069860279441117 x 100 = -50.7%