-64.16% is the change from 279 to 100
Calculation steps:
[( 100 - 279 ) ÷ 279] x 100 = -64.16%
Formula
Percentage change = [(100 - 279) / 279] x 100
Subtract the new number by the original number
100 - 279 = -179
-179 ÷ 279 = -0.6415770609318996
-0.6415770609318996 x 100 = -64.16%