51.48% is the change from 641 to 971
Calculation steps:
[( 971 - 641 ) ÷ 641] x 100 = 51.48%
Formula
Percentage change = [(971 - 641) / 641] x 100
Subtract the new number by the original number
971 - 641 = 330
330 ÷ 641 = 0.514820592823713
0.514820592823713 x 100 = 51.48%