2.88% is the change from 971 to 999
Calculation steps:
[( 999 - 971 ) ÷ 971] x 100 = 2.88%
Formula
Percentage change = [(999 - 971) / 971] x 100
Subtract the new number by the original number
999 - 971 = 28
28 ÷ 971 = 0.028836251287332648
0.028836251287332648 x 100 = 2.88%