-64.33% is the change from 642 to 229
Calculation steps:
[( 229 - 642 ) ÷ 642] x 100 = -64.33%
Formula
Percentage change = [(229 - 642) / 642] x 100
Subtract the new number by the original number
229 - 642 = -413
-413 ÷ 642 = -0.6433021806853583
-0.6433021806853583 x 100 = -64.33%