-3.3% is the change from 849 to 821
Calculation steps:
[( 821 - 849 ) ÷ 849] x 100 = -3.3%
Formula
Percentage change = [(821 - 849) / 849] x 100
Subtract the new number by the original number
821 - 849 = -28
-28 ÷ 849 = -0.03297997644287397
-0.03297997644287397 x 100 = -3.3%