-35.05% is the change from 642 to 417
Calculation steps:
[( 417 - 642 ) ÷ 642] x 100 = -35.05%
Formula
Percentage change = [(417 - 642) / 642] x 100
Subtract the new number by the original number
417 - 642 = -225
-225 ÷ 642 = -0.35046728971962615
-0.35046728971962615 x 100 = -35.05%