-79.25% is the change from 617 to 128
Calculation steps:
[( 128 - 617 ) ÷ 617] x 100 = -79.25%
Formula
Percentage change = [(128 - 617) / 617] x 100
Subtract the new number by the original number
128 - 617 = -489
-489 ÷ 617 = -0.7925445705024311
-0.7925445705024311 x 100 = -79.25%