-87.03% is the change from 617 to 80
Calculation steps:
[( 80 - 617 ) ÷ 617] x 100 = -87.03%
Formula
Percentage change = [(80 - 617) / 617] x 100
Subtract the new number by the original number
80 - 617 = -537
-537 ÷ 617 = -0.8703403565640194
-0.8703403565640194 x 100 = -87.03%