11.11% is the change from 18 to 20
Calculation steps:
[( 20 - 18 ) ÷ 18] x 100 = 11.11%
Formula
Percentage change = [(20 - 18) / 18] x 100
Subtract the new number by the original number
20 - 18 = 2
2 ÷ 18 = 0.1111111111111111
0.1111111111111111 x 100 = 11.11%