96.91% is the change from 421 to 829
Calculation steps:
[( 829 - 421 ) ÷ 421] x 100 = 96.91%
Formula
Percentage change = [(829 - 421) / 421] x 100
Subtract the new number by the original number
829 - 421 = 408
408 ÷ 421 = 0.9691211401425178
0.9691211401425178 x 100 = 96.91%