89.79% is the change from 421 to 799
Calculation steps:
[( 799 - 421 ) ÷ 421] x 100 = 89.79%
Formula
Percentage change = [(799 - 421) / 421] x 100
Subtract the new number by the original number
799 - 421 = 378
378 ÷ 421 = 0.8978622327790974
0.8978622327790974 x 100 = 89.79%