89.13% is the change from 423 to 800
Calculation steps:
[( 800 - 423 ) ÷ 423] x 100 = 89.13%
Formula
Percentage change = [(800 - 423) / 423] x 100
Subtract the new number by the original number
800 - 423 = 377
377 ÷ 423 = 0.8912529550827423
0.8912529550827423 x 100 = 89.13%