-6.6% is the change from 864 to 807
Calculation steps:
[( 807 - 864 ) ÷ 864] x 100 = -6.6%
Formula
Percentage change = [(807 - 864) / 864] x 100
Subtract the new number by the original number
807 - 864 = -57
-57 ÷ 864 = -0.06597222222222222
-0.06597222222222222 x 100 = -6.6%