-19.19% is the change from 667 to 539
Calculation steps:
[( 539 - 667 ) ÷ 667] x 100 = -19.19%
Formula
Percentage change = [(539 - 667) / 667] x 100
Subtract the new number by the original number
539 - 667 = -128
-128 ÷ 667 = -0.191904047976012
-0.191904047976012 x 100 = -19.19%