-2.47% is the change from 849 to 828
Calculation steps:
[( 828 - 849 ) ÷ 849] x 100 = -2.47%
Formula
Percentage change = [(828 - 849) / 849] x 100
Subtract the new number by the original number
828 - 849 = -21
-21 ÷ 849 = -0.024734982332155476
-0.024734982332155476 x 100 = -2.47%