-57.01% is the change from 642 to 276
Calculation steps:
[( 276 - 642 ) ÷ 642] x 100 = -57.01%
Formula
Percentage change = [(276 - 642) / 642] x 100
Subtract the new number by the original number
276 - 642 = -366
-366 ÷ 642 = -0.5700934579439252
-0.5700934579439252 x 100 = -57.01%