-3.47% is the change from 317 to 306
Calculation steps:
[( 306 - 317 ) ÷ 317] x 100 = -3.47%
Formula
Percentage change = [(306 - 317) / 317] x 100
Subtract the new number by the original number
306 - 317 = -11
-11 ÷ 317 = -0.03470031545741325
-0.03470031545741325 x 100 = -3.47%