-2.58% is the change from 813 to 792
Calculation steps:
[( 792 - 813 ) ÷ 813] x 100 = -2.58%
Formula
Percentage change = [(792 - 813) / 813] x 100
Subtract the new number by the original number
792 - 813 = -21
-21 ÷ 813 = -0.025830258302583026
-0.025830258302583026 x 100 = -2.58%