-91.4% is the change from 919 to 79
Calculation steps:
[( 79 - 919 ) ÷ 919] x 100 = -91.4%
Formula
Percentage change = [(79 - 919) / 919] x 100
Subtract the new number by the original number
79 - 919 = -840
-840 ÷ 919 = -0.9140369967355821
-0.9140369967355821 x 100 = -91.4%