-39.13% is the change from 800 to 487
Calculation steps:
[( 487 - 800 ) ÷ 800] x 100 = -39.13%
Formula
Percentage change = [(487 - 800) / 800] x 100
Subtract the new number by the original number
487 - 800 = -313
-313 ÷ 800 = -0.39125
-0.39125 x 100 = -39.13%