-4.25% is the change from 870 to 833
Calculation steps:
[( 833 - 870 ) ÷ 870] x 100 = -4.25%
Formula
Percentage change = [(833 - 870) / 870] x 100
Subtract the new number by the original number
833 - 870 = -37
-37 ÷ 870 = -0.04252873563218391
-0.04252873563218391 x 100 = -4.25%