33.4% is the change from 479 to 639
Calculation steps:
[( 639 - 479 ) ÷ 479] x 100 = 33.4%
Formula
Percentage change = [(639 - 479) / 479] x 100
Subtract the new number by the original number
639 - 479 = 160
160 ÷ 479 = 0.33402922755741127
0.33402922755741127 x 100 = 33.4%