308% is the change from 50 to 204
Calculation steps:
[( 204 - 50 ) ÷ 50] x 100 = 308%
Formula
Percentage change = [(204 - 50) / 50] x 100
Subtract the new number by the original number
204 - 50 = 154
154 ÷ 50 = 3.08
3.08 x 100 = 308%
Example