2.5% is the change from 200 to 205
Calculation steps:
[( 205 - 200 ) ÷ 200] x 100 = 2.5%
Formula
Percentage change = [(205 - 200) / 200] x 100
Subtract the new number by the original number
205 - 200 = 5
5 ÷ 200 = 0.025
0.025 x 100 = 2.5%
Example