-35.23% is the change from 985 to 638
Calculation steps:
[( 638 - 985 ) ÷ 985] x 100 = -35.23%
Formula
Percentage change = [(638 - 985) / 985] x 100
Subtract the new number by the original number
638 - 985 = -347
-347 ÷ 985 = -0.3522842639593909
-0.3522842639593909 x 100 = -35.23%