-19.53% is the change from 804 to 647
Calculation steps:
[( 647 - 804 ) ÷ 804] x 100 = -19.53%
Formula
Percentage change = [(647 - 804) / 804] x 100
Subtract the new number by the original number
647 - 804 = -157
-157 ÷ 804 = -0.19527363184079602
-0.19527363184079602 x 100 = -19.53%