-29.15% is the change from 971 to 688
Calculation steps:
[( 688 - 971 ) ÷ 971] x 100 = -29.15%
Formula
Percentage change = [(688 - 971) / 971] x 100
Subtract the new number by the original number
688 - 971 = -283
-283 ÷ 971 = -0.29145211122554066
-0.29145211122554066 x 100 = -29.15%