-2.61% is the change from 997 to 971
Calculation steps:
[( 971 - 997 ) ÷ 997] x 100 = -2.61%
Formula
Percentage change = [(971 - 997) / 997] x 100
Subtract the new number by the original number
971 - 997 = -26
-26 ÷ 997 = -0.026078234704112337
-0.026078234704112337 x 100 = -2.61%