-69.4% is the change from 317 to 97
Calculation steps:
[( 97 - 317 ) ÷ 317] x 100 = -69.4%
Formula
Percentage change = [(97 - 317) / 317] x 100
Subtract the new number by the original number
97 - 317 = -220
-220 ÷ 317 = -0.694006309148265
-0.694006309148265 x 100 = -69.4%