96.67% is the change from 421 to 828
Calculation steps:
[( 828 - 421 ) ÷ 421] x 100 = 96.67%
Formula
Percentage change = [(828 - 421) / 421] x 100
Subtract the new number by the original number
828 - 421 = 407
407 ÷ 421 = 0.9667458432304038
0.9667458432304038 x 100 = 96.67%