18.72% is the change from 422 to 501
Calculation steps:
[( 501 - 422 ) ÷ 422] x 100 = 18.72%
Formula
Percentage change = [(501 - 422) / 422] x 100
Subtract the new number by the original number
501 - 422 = 79
79 ÷ 422 = 0.1872037914691943
0.1872037914691943 x 100 = 18.72%