-33.43% is the change from 347 to 231
Calculation steps:
[( 231 - 347 ) ÷ 347] x 100 = -33.43%
Formula
Percentage change = [(231 - 347) / 347] x 100
Subtract the new number by the original number
231 - 347 = -116
-116 ÷ 347 = -0.33429394812680113
-0.33429394812680113 x 100 = -33.43%