-3.17% is the change from 851 to 824
Calculation steps:
[( 824 - 851 ) ÷ 851] x 100 = -3.17%
Formula
Percentage change = [(824 - 851) / 851] x 100
Subtract the new number by the original number
824 - 851 = -27
-27 ÷ 851 = -0.03172737955346651
-0.03172737955346651 x 100 = -3.17%