2711.11% is the change from 18 to 506
Calculation steps:
[( 506 - 18 ) ÷ 18] x 100 = 2711.11%
Formula
Percentage change = [(506 - 18) / 18] x 100
Subtract the new number by the original number
506 - 18 = 488
488 ÷ 18 = 27.11111111111111
27.11111111111111 x 100 = 2711.11%