-70.5% is the change from 278 to 82
Calculation steps:
[( 82 - 278 ) ÷ 278] x 100 = -70.5%
Formula
Percentage change = [(82 - 278) / 278] x 100
Subtract the new number by the original number
82 - 278 = -196
-196 ÷ 278 = -0.7050359712230215
-0.7050359712230215 x 100 = -70.5%