-31.47% is the change from 340 to 233
Calculation steps:
[( 233 - 340 ) ÷ 340] x 100 = -31.47%
Formula
Percentage change = [(233 - 340) / 340] x 100
Subtract the new number by the original number
233 - 340 = -107
-107 ÷ 340 = -0.31470588235294117
-0.31470588235294117 x 100 = -31.47%