2.55% is the change from 824 to 845
Calculation steps:
[( 845 - 824 ) ÷ 824] x 100 = 2.55%
Formula
Percentage change = [(845 - 824) / 824] x 100
Subtract the new number by the original number
845 - 824 = 21
21 ÷ 824 = 0.025485436893203883
0.025485436893203883 x 100 = 2.55%