-52.8% is the change from 642 to 303
Calculation steps:
[( 303 - 642 ) ÷ 642] x 100 = -52.8%
Formula
Percentage change = [(303 - 642) / 642] x 100
Subtract the new number by the original number
303 - 642 = -339
-339 ÷ 642 = -0.5280373831775701
-0.5280373831775701 x 100 = -52.8%