-17.87% is the change from 666 to 547
Calculation steps:
[( 547 - 666 ) ÷ 666] x 100 = -17.87%
Formula
Percentage change = [(547 - 666) / 666] x 100
Subtract the new number by the original number
547 - 666 = -119
-119 ÷ 666 = -0.17867867867867868
-0.17867867867867868 x 100 = -17.87%