39.97% is the change from 658 to 921
Calculation steps:
[( 921 - 658 ) ÷ 658] x 100 = 39.97%
Formula
Percentage change = [(921 - 658) / 658] x 100
Subtract the new number by the original number
921 - 658 = 263
263 ÷ 658 = 0.39969604863221886
0.39969604863221886 x 100 = 39.97%