-57.48% is the change from 642 to 273
Calculation steps:
[( 273 - 642 ) ÷ 642] x 100 = -57.48%
Formula
Percentage change = [(273 - 642) / 642] x 100
Subtract the new number by the original number
273 - 642 = -369
-369 ÷ 642 = -0.5747663551401869
-0.5747663551401869 x 100 = -57.48%