-32.99% is the change from 870 to 583
Calculation steps:
[( 583 - 870 ) ÷ 870] x 100 = -32.99%
Formula
Percentage change = [(583 - 870) / 870] x 100
Subtract the new number by the original number
583 - 870 = -287
-287 ÷ 870 = -0.32988505747126434
-0.32988505747126434 x 100 = -32.99%