-12.9% is the change from 279 to 243
Calculation steps:
[( 243 - 279 ) ÷ 279] x 100 = -12.9%
Formula
Percentage change = [(243 - 279) / 279] x 100
Subtract the new number by the original number
243 - 279 = -36
-36 ÷ 279 = -0.12903225806451613
-0.12903225806451613 x 100 = -12.9%