98.52% is the change from 405 to 804
Calculation steps:
[( 804 - 405 ) ÷ 405] x 100 = 98.52%
Formula
Percentage change = [(804 - 405) / 405] x 100
Subtract the new number by the original number
804 - 405 = 399
399 ÷ 405 = 0.9851851851851852
0.9851851851851852 x 100 = 98.52%