12.5% is the change from 16 to 18
Calculation steps:
[( 18 - 16 ) ÷ 16] x 100 = 12.5%
Formula
Percentage change = [(18 - 16) / 16] x 100
Subtract the new number by the original number
18 - 16 = 2
2 ÷ 16 = 0.125
0.125 x 100 = 12.5%
Example