-12.18% is the change from 870 to 764
Calculation steps:
[( 764 - 870 ) ÷ 870] x 100 = -12.18%
Formula
Percentage change = [(764 - 870) / 870] x 100
Subtract the new number by the original number
764 - 870 = -106
-106 ÷ 870 = -0.12183908045977011
-0.12183908045977011 x 100 = -12.18%