538.1% is the change from 126 to 804
Calculation steps:
[( 804 - 126 ) ÷ 126] x 100 = 538.1%
Formula
Percentage change = [(804 - 126) / 126] x 100
Subtract the new number by the original number
804 - 126 = 678
678 ÷ 126 = 5.380952380952381
5.380952380952381 x 100 = 538.1%