-67.74% is the change from 279 to 90
Calculation steps:
[( 90 - 279 ) ÷ 279] x 100 = -67.74%
Formula
Percentage change = [(90 - 279) / 279] x 100
Subtract the new number by the original number
90 - 279 = -189
-189 ÷ 279 = -0.6774193548387096
-0.6774193548387096 x 100 = -67.74%