-2.42% is the change from 827 to 807
Calculation steps:
[( 807 - 827 ) ÷ 827] x 100 = -2.42%
Formula
Percentage change = [(807 - 827) / 827] x 100
Subtract the new number by the original number
807 - 827 = -20
-20 ÷ 827 = -0.02418379685610641
-0.02418379685610641 x 100 = -2.42%