-87.07% is the change from 611 to 79
Calculation steps:
[( 79 - 611 ) ÷ 611] x 100 = -87.07%
Formula
Percentage change = [(79 - 611) / 611] x 100
Subtract the new number by the original number
79 - 611 = -532
-532 ÷ 611 = -0.8707037643207856
-0.8707037643207856 x 100 = -87.07%