-13.59% is the change from 971 to 839
Calculation steps:
[( 839 - 971 ) ÷ 971] x 100 = -13.59%
Formula
Percentage change = [(839 - 971) / 971] x 100
Subtract the new number by the original number
839 - 971 = -132
-132 ÷ 971 = -0.13594232749742532
-0.13594232749742532 x 100 = -13.59%