-96.41% is the change from 501 to 18
Calculation steps:
[( 18 - 501 ) ÷ 501] x 100 = -96.41%
Formula
Percentage change = [(18 - 501) / 501] x 100
Subtract the new number by the original number
18 - 501 = -483
-483 ÷ 501 = -0.9640718562874252
-0.9640718562874252 x 100 = -96.41%