32.73% is the change from 501 to 665
Calculation steps:
[( 665 - 501 ) ÷ 501] x 100 = 32.73%
Formula
Percentage change = [(665 - 501) / 501] x 100
Subtract the new number by the original number
665 - 501 = 164
164 ÷ 501 = 0.3273453093812375
0.3273453093812375 x 100 = 32.73%