-16.63% is the change from 824 to 687
Calculation steps:
[( 687 - 824 ) ÷ 824] x 100 = -16.63%
Formula
Percentage change = [(687 - 824) / 824] x 100
Subtract the new number by the original number
687 - 824 = -137
-137 ÷ 824 = -0.1662621359223301
-0.1662621359223301 x 100 = -16.63%