-58.71% is the change from 666 to 275
Calculation steps:
[( 275 - 666 ) ÷ 666] x 100 = -58.71%
Formula
Percentage change = [(275 - 666) / 666] x 100
Subtract the new number by the original number
275 - 666 = -391
-391 ÷ 666 = -0.5870870870870871
-0.5870870870870871 x 100 = -58.71%