-94.52% is the change from 639 to 35
Calculation steps:
[( 35 - 639 ) ÷ 639] x 100 = -94.52%
Formula
Percentage change = [(35 - 639) / 639] x 100
Subtract the new number by the original number
35 - 639 = -604
-604 ÷ 639 = -0.945226917057903
-0.945226917057903 x 100 = -94.52%