-83.33% is the change from 642 to 107
Calculation steps:
[( 107 - 642 ) ÷ 642] x 100 = -83.33%
Formula
Percentage change = [(107 - 642) / 642] x 100
Subtract the new number by the original number
107 - 642 = -535
-535 ÷ 642 = -0.8333333333333334
-0.8333333333333334 x 100 = -83.33%