-58.11% is the change from 666 to 279
Calculation steps:
[( 279 - 666 ) ÷ 666] x 100 = -58.11%
Formula
Percentage change = [(279 - 666) / 666] x 100
Subtract the new number by the original number
279 - 666 = -387
-387 ÷ 666 = -0.581081081081081
-0.581081081081081 x 100 = -58.11%