102.5% is the change from 200 to 405
Calculation steps:
[( 405 - 200 ) ÷ 200] x 100 = 102.5%
Formula
Percentage change = [(405 - 200) / 200] x 100
Subtract the new number by the original number
405 - 200 = 205
205 ÷ 200 = 1.025
1.025 x 100 = 102.5%
Example