-57.73% is the change from 660 to 279
Calculation steps:
[( 279 - 660 ) ÷ 660] x 100 = -57.73%
Formula
Percentage change = [(279 - 660) / 660] x 100
Subtract the new number by the original number
279 - 660 = -381
-381 ÷ 660 = -0.5772727272727273
-0.5772727272727273 x 100 = -57.73%