-83.47% is the change from 617 to 102
Calculation steps:
[( 102 - 617 ) ÷ 617] x 100 = -83.47%
Formula
Percentage change = [(102 - 617) / 617] x 100
Subtract the new number by the original number
102 - 617 = -515
-515 ÷ 617 = -0.8346839546191248
-0.8346839546191248 x 100 = -83.47%