205% is the change from 100 to 305
Calculation steps:
[( 305 - 100 ) ÷ 100] x 100 = 205%
Formula
Percentage change = [(305 - 100) / 100] x 100
Subtract the new number by the original number
305 - 100 = 205
205 ÷ 100 = 2.05
2.05 x 100 = 205%
Example