-98.7% is the change from 771 to 10
Calculation steps:
[( 10 - 771 ) ÷ 771] x 100 = -98.7%
Formula
Percentage change = [(10 - 771) / 771] x 100
Subtract the new number by the original number
10 - 771 = -761
-761 ÷ 771 = -0.9870298313878081
-0.9870298313878081 x 100 = -98.7%