41.72% is the change from 640 to 907
Calculation steps:
[( 907 - 640 ) ÷ 640] x 100 = 41.72%
Formula
Percentage change = [(907 - 640) / 640] x 100
Subtract the new number by the original number
907 - 640 = 267
267 ÷ 640 = 0.4171875
0.4171875 x 100 = 41.72%