33.61% is the change from 479 to 640
Calculation steps:
[( 640 - 479 ) ÷ 479] x 100 = 33.61%
Formula
Percentage change = [(640 - 479) / 479] x 100
Subtract the new number by the original number
640 - 479 = 161
161 ÷ 479 = 0.33611691022964507
0.33611691022964507 x 100 = 33.61%