-4.02% is the change from 821 to 788
Calculation steps:
[( 788 - 821 ) ÷ 821] x 100 = -4.02%
Formula
Percentage change = [(788 - 821) / 821] x 100
Subtract the new number by the original number
788 - 821 = -33
-33 ÷ 821 = -0.040194884287454324
-0.040194884287454324 x 100 = -4.02%