-83.91% is the change from 261 to 42
Calculation steps:
[( 42 - 261 ) ÷ 261] x 100 = -83.91%
Formula
Percentage change = [(42 - 261) / 261] x 100
Subtract the new number by the original number
42 - 261 = -219
-219 ÷ 261 = -0.8390804597701149
-0.8390804597701149 x 100 = -83.91%