-59.35% is the change from 642 to 261
Calculation steps:
[( 261 - 642 ) ÷ 642] x 100 = -59.35%
Formula
Percentage change = [(261 - 642) / 642] x 100
Subtract the new number by the original number
261 - 642 = -381
-381 ÷ 642 = -0.5934579439252337
-0.5934579439252337 x 100 = -59.35%