-7.94% is the change from 945 to 870
Calculation steps:
[( 870 - 945 ) ÷ 945] x 100 = -7.94%
Formula
Percentage change = [(870 - 945) / 945] x 100
Subtract the new number by the original number
870 - 945 = -75
-75 ÷ 945 = -0.07936507936507936
-0.07936507936507936 x 100 = -7.94%