2683.33% is the change from 18 to 501
Calculation steps:
[( 501 - 18 ) ÷ 18] x 100 = 2683.33%
Formula
Percentage change = [(501 - 18) / 18] x 100
Subtract the new number by the original number
501 - 18 = 483
483 ÷ 18 = 26.833333333333332
26.833333333333332 x 100 = 2683.33%