25.47% is the change from 640 to 803
Calculation steps:
[( 803 - 640 ) ÷ 640] x 100 = 25.47%
Formula
Percentage change = [(803 - 640) / 640] x 100
Subtract the new number by the original number
803 - 640 = 163
163 ÷ 640 = 0.2546875
0.2546875 x 100 = 25.47%