2.5% is the change from 160 to 164
Calculation steps:
[( 164 - 160 ) ÷ 160] x 100 = 2.5%
Formula
Percentage change = [(164 - 160) / 160] x 100
Subtract the new number by the original number
164 - 160 = 4
4 ÷ 160 = 0.025
0.025 x 100 = 2.5%
Example