33.73% is the change from 501 to 670
Calculation steps:
[( 670 - 501 ) ÷ 501] x 100 = 33.73%
Formula
Percentage change = [(670 - 501) / 501] x 100
Subtract the new number by the original number
670 - 501 = 169
169 ÷ 501 = 0.3373253493013972
0.3373253493013972 x 100 = 33.73%