-87.39% is the change from 238 to 30
Calculation steps:
[( 30 - 238 ) ÷ 238] x 100 = -87.39%
Formula
Percentage change = [(30 - 238) / 238] x 100
Subtract the new number by the original number
30 - 238 = -208
-208 ÷ 238 = -0.8739495798319328
-0.8739495798319328 x 100 = -87.39%