-9.8% is the change from 939 to 847
Calculation steps:
[( 847 - 939 ) ÷ 939] x 100 = -9.8%
Formula
Percentage change = [(847 - 939) / 939] x 100
Subtract the new number by the original number
847 - 939 = -92
-92 ÷ 939 = -0.0979765708200213
-0.0979765708200213 x 100 = -9.8%