-24.45% is the change from 642 to 485
Calculation steps:
[( 485 - 642 ) ÷ 642] x 100 = -24.45%
Formula
Percentage change = [(485 - 642) / 642] x 100
Subtract the new number by the original number
485 - 642 = -157
-157 ÷ 642 = -0.24454828660436137
-0.24454828660436137 x 100 = -24.45%