-88.51% is the change from 261 to 30
Calculation steps:
[( 30 - 261 ) ÷ 261] x 100 = -88.51%
Formula
Percentage change = [(30 - 261) / 261] x 100
Subtract the new number by the original number
30 - 261 = -231
-231 ÷ 261 = -0.8850574712643678
-0.8850574712643678 x 100 = -88.51%