2.21% is the change from 950 to 971
Calculation steps:
[( 971 - 950 ) ÷ 950] x 100 = 2.21%
Formula
Percentage change = [(971 - 950) / 950] x 100
Subtract the new number by the original number
971 - 950 = 21
21 ÷ 950 = 0.022105263157894735
0.022105263157894735 x 100 = 2.21%