-98.23% is the change from 847 to 15
Calculation steps:
[( 15 - 847 ) ÷ 847] x 100 = -98.23%
Formula
Percentage change = [(15 - 847) / 847] x 100
Subtract the new number by the original number
15 - 847 = -832
-832 ÷ 847 = -0.9822904368358913
-0.9822904368358913 x 100 = -98.23%