103.98% is the change from 402 to 820
Calculation steps:
[( 820 - 402 ) ÷ 402] x 100 = 103.98%
Formula
Percentage change = [(820 - 402) / 402] x 100
Subtract the new number by the original number
820 - 402 = 418
418 ÷ 402 = 1.0398009950248757
1.0398009950248757 x 100 = 103.98%