34.81% is the change from 474 to 639
Calculation steps:
[( 639 - 474 ) ÷ 474] x 100 = 34.81%
Formula
Percentage change = [(639 - 474) / 474] x 100
Subtract the new number by the original number
639 - 474 = 165
165 ÷ 474 = 0.34810126582278483
0.34810126582278483 x 100 = 34.81%