-89.88% is the change from 642 to 65
Calculation steps:
[( 65 - 642 ) ÷ 642] x 100 = -89.88%
Formula
Percentage change = [(65 - 642) / 642] x 100
Subtract the new number by the original number
65 - 642 = -577
-577 ÷ 642 = -0.8987538940809969
-0.8987538940809969 x 100 = -89.88%