-82.35% is the change from 306 to 54
Calculation steps:
[( 54 - 306 ) ÷ 306] x 100 = -82.35%
Formula
Percentage change = [(54 - 306) / 306] x 100
Subtract the new number by the original number
54 - 306 = -252
-252 ÷ 306 = -0.8235294117647058
-0.8235294117647058 x 100 = -82.35%