-27.76% is the change from 317 to 229
Calculation steps:
[( 229 - 317 ) ÷ 317] x 100 = -27.76%
Formula
Percentage change = [(229 - 317) / 317] x 100
Subtract the new number by the original number
229 - 317 = -88
-88 ÷ 317 = -0.277602523659306
-0.277602523659306 x 100 = -27.76%