2661.11% is the change from 18 to 497
Calculation steps:
[( 497 - 18 ) ÷ 18] x 100 = 2661.11%
Formula
Percentage change = [(497 - 18) / 18] x 100
Subtract the new number by the original number
497 - 18 = 479
479 ÷ 18 = 26.61111111111111
26.61111111111111 x 100 = 2661.11%