-17.63% is the change from 834 to 687
Calculation steps:
[( 687 - 834 ) ÷ 834] x 100 = -17.63%
Formula
Percentage change = [(687 - 834) / 834] x 100
Subtract the new number by the original number
687 - 834 = -147
-147 ÷ 834 = -0.17625899280575538
-0.17625899280575538 x 100 = -17.63%