-15.3% is the change from 1000 to 847
Calculation steps:
[( 847 - 1000 ) ÷ 1000] x 100 = -15.3%
Formula
Percentage change = [(847 - 1000) / 1000] x 100
Subtract the new number by the original number
847 - 1000 = -153
-153 ÷ 1000 = -0.153
-0.153 x 100 = -15.3%