50.08% is the change from 647 to 971
Calculation steps:
[( 971 - 647 ) ÷ 647] x 100 = 50.08%
Formula
Percentage change = [(971 - 647) / 647] x 100
Subtract the new number by the original number
971 - 647 = 324
324 ÷ 647 = 0.500772797527048
0.500772797527048 x 100 = 50.08%