-96.7% is the change from 545 to 18
Calculation steps:
[( 18 - 545 ) ÷ 545] x 100 = -96.7%
Formula
Percentage change = [(18 - 545) / 545] x 100
Subtract the new number by the original number
18 - 545 = -527
-527 ÷ 545 = -0.9669724770642202
-0.9669724770642202 x 100 = -96.7%