710% is the change from 50 to 405
Calculation steps:
[( 405 - 50 ) ÷ 50] x 100 = 710%
Formula
Percentage change = [(405 - 50) / 50] x 100
Subtract the new number by the original number
405 - 50 = 355
355 ÷ 50 = 7.1
7.1 x 100 = 710%
Example