-99.79% is the change from 931 to 2
Calculation steps:
[( 2 - 931 ) ÷ 931] x 100 = -99.79%
Formula
Percentage change = [(2 - 931) / 931] x 100
Subtract the new number by the original number
2 - 931 = -929
-929 ÷ 931 = -0.9978517722878625
-0.9978517722878625 x 100 = -99.79%