-7.25% is the change from 938 to 870
Calculation steps:
[( 870 - 938 ) ÷ 938] x 100 = -7.25%
Formula
Percentage change = [(870 - 938) / 938] x 100
Subtract the new number by the original number
870 - 938 = -68
-68 ÷ 938 = -0.07249466950959488
-0.07249466950959488 x 100 = -7.25%