-94.12% is the change from 306 to 18
Calculation steps:
[( 18 - 306 ) ÷ 306] x 100 = -94.12%
Formula
Percentage change = [(18 - 306) / 306] x 100
Subtract the new number by the original number
18 - 306 = -288
-288 ÷ 306 = -0.9411764705882353
-0.9411764705882353 x 100 = -94.12%