-8.23% is the change from 851 to 781
Calculation steps:
[( 781 - 851 ) ÷ 851] x 100 = -8.23%
Formula
Percentage change = [(781 - 851) / 851] x 100
Subtract the new number by the original number
781 - 851 = -70
-70 ÷ 851 = -0.08225616921269095
-0.08225616921269095 x 100 = -8.23%