-2.53% is the change from 870 to 848
Calculation steps:
[( 848 - 870 ) ÷ 870] x 100 = -2.53%
Formula
Percentage change = [(848 - 870) / 870] x 100
Subtract the new number by the original number
848 - 870 = -22
-22 ÷ 870 = -0.02528735632183908
-0.02528735632183908 x 100 = -2.53%