-4.71% is the change from 913 to 870
Calculation steps:
[( 870 - 913 ) ÷ 913] x 100 = -4.71%
Formula
Percentage change = [(870 - 913) / 913] x 100
Subtract the new number by the original number
870 - 913 = -43
-43 ÷ 913 = -0.047097480832420595
-0.047097480832420595 x 100 = -4.71%