95.49% is the change from 421 to 823
Calculation steps:
[( 823 - 421 ) ÷ 421] x 100 = 95.49%
Formula
Percentage change = [(823 - 421) / 421] x 100
Subtract the new number by the original number
823 - 421 = 402
402 ÷ 421 = 0.9548693586698337
0.9548693586698337 x 100 = 95.49%