-47.13% is the change from 800 to 423
Calculation steps:
[( 423 - 800 ) ÷ 800] x 100 = -47.13%
Formula
Percentage change = [(423 - 800) / 800] x 100
Subtract the new number by the original number
423 - 800 = -377
-377 ÷ 800 = -0.47125
-0.47125 x 100 = -47.13%