-96.65% is the change from 538 to 18
Calculation steps:
[( 18 - 538 ) ÷ 538] x 100 = -96.65%
Formula
Percentage change = [(18 - 538) / 538] x 100
Subtract the new number by the original number
18 - 538 = -520
-520 ÷ 538 = -0.966542750929368
-0.966542750929368 x 100 = -96.65%