40.4% is the change from 646 to 907
Calculation steps:
[( 907 - 646 ) ÷ 646] x 100 = 40.4%
Formula
Percentage change = [(907 - 646) / 646] x 100
Subtract the new number by the original number
907 - 646 = 261
261 ÷ 646 = 0.4040247678018576
0.4040247678018576 x 100 = 40.4%