-34.63% is the change from 800 to 523
Calculation steps:
[( 523 - 800 ) ÷ 800] x 100 = -34.63%
Formula
Percentage change = [(523 - 800) / 800] x 100
Subtract the new number by the original number
523 - 800 = -277
-277 ÷ 800 = -0.34625
-0.34625 x 100 = -34.63%