56.61% is the change from 620 to 971
Calculation steps:
[( 971 - 620 ) ÷ 620] x 100 = 56.61%
Formula
Percentage change = [(971 - 620) / 620] x 100
Subtract the new number by the original number
971 - 620 = 351
351 ÷ 620 = 0.5661290322580645
0.5661290322580645 x 100 = 56.61%