550% is the change from 126 to 819
Calculation steps:
[( 819 - 126 ) ÷ 126] x 100 = 550%
Formula
Percentage change = [(819 - 126) / 126] x 100
Subtract the new number by the original number
819 - 126 = 693
693 ÷ 126 = 5.5
5.5 x 100 = 550%
Example