-88.51% is the change from 348 to 40
Calculation steps:
[( 40 - 348 ) ÷ 348] x 100 = -88.51%
Formula
Percentage change = [(40 - 348) / 348] x 100
Subtract the new number by the original number
40 - 348 = -308
-308 ÷ 348 = -0.8850574712643678
-0.8850574712643678 x 100 = -88.51%