50.31% is the change from 646 to 971
Calculation steps:
[( 971 - 646 ) ÷ 646] x 100 = 50.31%
Formula
Percentage change = [(971 - 646) / 646] x 100
Subtract the new number by the original number
971 - 646 = 325
325 ÷ 646 = 0.5030959752321982
0.5030959752321982 x 100 = 50.31%