450% is the change from 50 to 275
Calculation steps:
[( 275 - 50 ) ÷ 50] x 100 = 450%
Formula
Percentage change = [(275 - 50) / 50] x 100
Subtract the new number by the original number
275 - 50 = 225
225 ÷ 50 = 4.5
4.5 x 100 = 450%
Example