48.55% is the change from 620 to 921
Calculation steps:
[( 921 - 620 ) ÷ 620] x 100 = 48.55%
Formula
Percentage change = [(921 - 620) / 620] x 100
Subtract the new number by the original number
921 - 620 = 301
301 ÷ 620 = 0.4854838709677419
0.4854838709677419 x 100 = 48.55%