-23.61% is the change from 847 to 647
Calculation steps:
[( 647 - 847 ) ÷ 847] x 100 = -23.61%
Formula
Percentage change = [(647 - 847) / 847] x 100
Subtract the new number by the original number
647 - 847 = -200
-200 ÷ 847 = -0.2361275088547816
-0.2361275088547816 x 100 = -23.61%