-2.07% is the change from 870 to 852
Calculation steps:
[( 852 - 870 ) ÷ 870] x 100 = -2.07%
Formula
Percentage change = [(852 - 870) / 870] x 100
Subtract the new number by the original number
852 - 870 = -18
-18 ÷ 870 = -0.020689655172413793
-0.020689655172413793 x 100 = -2.07%