-23.97% is the change from 847 to 644
Calculation steps:
[( 644 - 847 ) ÷ 847] x 100 = -23.97%
Formula
Percentage change = [(644 - 847) / 847] x 100
Subtract the new number by the original number
644 - 847 = -203
-203 ÷ 847 = -0.2396694214876033
-0.2396694214876033 x 100 = -23.97%