-1.72% is the change from 988 to 971
Calculation steps:
[( 971 - 988 ) ÷ 988] x 100 = -1.72%
Formula
Percentage change = [(971 - 988) / 988] x 100
Subtract the new number by the original number
971 - 988 = -17
-17 ÷ 988 = -0.01720647773279352
-0.01720647773279352 x 100 = -1.72%