-90.56% is the change from 837 to 79
Calculation steps:
[( 79 - 837 ) ÷ 837] x 100 = -90.56%
Formula
Percentage change = [(79 - 837) / 837] x 100
Subtract the new number by the original number
79 - 837 = -758
-758 ÷ 837 = -0.9056152927120669
-0.9056152927120669 x 100 = -90.56%