-17.81% is the change from 657 to 540
Calculation steps:
[( 540 - 657 ) ÷ 657] x 100 = -17.81%
Formula
Percentage change = [(540 - 657) / 657] x 100
Subtract the new number by the original number
540 - 657 = -117
-117 ÷ 657 = -0.1780821917808219
-0.1780821917808219 x 100 = -17.81%