-13.91% is the change from 870 to 749
Calculation steps:
[( 749 - 870 ) ÷ 870] x 100 = -13.91%
Formula
Percentage change = [(749 - 870) / 870] x 100
Subtract the new number by the original number
749 - 870 = -121
-121 ÷ 870 = -0.13908045977011493
-0.13908045977011493 x 100 = -13.91%