-43.4% is the change from 871 to 493
Calculation steps:
[( 493 - 871 ) ÷ 871] x 100 = -43.4%
Formula
Percentage change = [(493 - 871) / 871] x 100
Subtract the new number by the original number
493 - 871 = -378
-378 ÷ 871 = -0.43398392652123996
-0.43398392652123996 x 100 = -43.4%