-19.04% is the change from 667 to 540
Calculation steps:
[( 540 - 667 ) ÷ 667] x 100 = -19.04%
Formula
Percentage change = [(540 - 667) / 667] x 100
Subtract the new number by the original number
540 - 667 = -127
-127 ÷ 667 = -0.1904047976011994
-0.1904047976011994 x 100 = -19.04%