-70.25% is the change from 279 to 83
Calculation steps:
[( 83 - 279 ) ÷ 279] x 100 = -70.25%
Formula
Percentage change = [(83 - 279) / 279] x 100
Subtract the new number by the original number
83 - 279 = -196
-196 ÷ 279 = -0.7025089605734767
-0.7025089605734767 x 100 = -70.25%