-67.97% is the change from 971 to 311
Calculation steps:
[( 311 - 971 ) ÷ 971] x 100 = -67.97%
Formula
Percentage change = [(311 - 971) / 971] x 100
Subtract the new number by the original number
311 - 971 = -660
-660 ÷ 971 = -0.6797116374871267
-0.6797116374871267 x 100 = -67.97%