-91.48% is the change from 317 to 27
Calculation steps:
[( 27 - 317 ) ÷ 317] x 100 = -91.48%
Formula
Percentage change = [(27 - 317) / 317] x 100
Subtract the new number by the original number
27 - 317 = -290
-290 ÷ 317 = -0.9148264984227129
-0.9148264984227129 x 100 = -91.48%