-76.34% is the change from 279 to 66
Calculation steps:
[( 66 - 279 ) ÷ 279] x 100 = -76.34%
Formula
Percentage change = [(66 - 279) / 279] x 100
Subtract the new number by the original number
66 - 279 = -213
-213 ÷ 279 = -0.7634408602150538
-0.7634408602150538 x 100 = -76.34%