-64.17% is the change from 642 to 230
Calculation steps:
[( 230 - 642 ) ÷ 642] x 100 = -64.17%
Formula
Percentage change = [(230 - 642) / 642] x 100
Subtract the new number by the original number
230 - 642 = -412
-412 ÷ 642 = -0.6417445482866043
-0.6417445482866043 x 100 = -64.17%