39.12% is the change from 662 to 921
Calculation steps:
[( 921 - 662 ) ÷ 662] x 100 = 39.12%
Formula
Percentage change = [(921 - 662) / 662] x 100
Subtract the new number by the original number
921 - 662 = 259
259 ÷ 662 = 0.39123867069486407
0.39123867069486407 x 100 = 39.12%