34.45% is the change from 476 to 640
Calculation steps:
[( 640 - 476 ) ÷ 476] x 100 = 34.45%
Formula
Percentage change = [(640 - 476) / 476] x 100
Subtract the new number by the original number
640 - 476 = 164
164 ÷ 476 = 0.3445378151260504
0.3445378151260504 x 100 = 34.45%