-13.17% is the change from 820 to 712
Calculation steps:
[( 712 - 820 ) ÷ 820] x 100 = -13.17%
Formula
Percentage change = [(712 - 820) / 820] x 100
Subtract the new number by the original number
712 - 820 = -108
-108 ÷ 820 = -0.13170731707317074
-0.13170731707317074 x 100 = -13.17%