-3.23% is the change from 279 to 270
Calculation steps:
[( 270 - 279 ) ÷ 279] x 100 = -3.23%
Formula
Percentage change = [(270 - 279) / 279] x 100
Subtract the new number by the original number
270 - 279 = -9
-9 ÷ 279 = -0.03225806451612903
-0.03225806451612903 x 100 = -3.23%