-91.62% is the change from 931 to 78
Calculation steps:
[( 78 - 931 ) ÷ 931] x 100 = -91.62%
Formula
Percentage change = [(78 - 931) / 931] x 100
Subtract the new number by the original number
78 - 931 = -853
-853 ÷ 931 = -0.916219119226638
-0.916219119226638 x 100 = -91.62%