-9.17% is the change from 851 to 773
Calculation steps:
[( 773 - 851 ) ÷ 851] x 100 = -9.17%
Formula
Percentage change = [(773 - 851) / 851] x 100
Subtract the new number by the original number
773 - 851 = -78
-78 ÷ 851 = -0.09165687426556991
-0.09165687426556991 x 100 = -9.17%