-89.58% is the change from 288 to 30
Calculation steps:
[( 30 - 288 ) ÷ 288] x 100 = -89.58%
Formula
Percentage change = [(30 - 288) / 288] x 100
Subtract the new number by the original number
30 - 288 = -258
-258 ÷ 288 = -0.8958333333333334
-0.8958333333333334 x 100 = -89.58%