-21.72% is the change from 847 to 663
Calculation steps:
[( 663 - 847 ) ÷ 847] x 100 = -21.72%
Formula
Percentage change = [(663 - 847) / 847] x 100
Subtract the new number by the original number
663 - 847 = -184
-184 ÷ 847 = -0.21723730814639905
-0.21723730814639905 x 100 = -21.72%