-63.61% is the change from 665 to 242
Calculation steps:
[( 242 - 665 ) ÷ 665] x 100 = -63.61%
Formula
Percentage change = [(242 - 665) / 665] x 100
Subtract the new number by the original number
242 - 665 = -423
-423 ÷ 665 = -0.6360902255639098
-0.6360902255639098 x 100 = -63.61%