-28.9% is the change from 903 to 642
Calculation steps:
[( 642 - 903 ) ÷ 903] x 100 = -28.9%
Formula
Percentage change = [(642 - 903) / 903] x 100
Subtract the new number by the original number
642 - 903 = -261
-261 ÷ 903 = -0.28903654485049834
-0.28903654485049834 x 100 = -28.9%