-9.78% is the change from 869 to 784
Calculation steps:
[( 784 - 869 ) ÷ 869] x 100 = -9.78%
Formula
Percentage change = [(784 - 869) / 869] x 100
Subtract the new number by the original number
784 - 869 = -85
-85 ÷ 869 = -0.09781357882623705
-0.09781357882623705 x 100 = -9.78%