-4.94% is the change from 870 to 827
Calculation steps:
[( 827 - 870 ) ÷ 870] x 100 = -4.94%
Formula
Percentage change = [(827 - 870) / 870] x 100
Subtract the new number by the original number
827 - 870 = -43
-43 ÷ 870 = -0.04942528735632184
-0.04942528735632184 x 100 = -4.94%