-52.41% is the change from 540 to 257
Calculation steps:
[( 257 - 540 ) ÷ 540] x 100 = -52.41%
Formula
Percentage change = [(257 - 540) / 540] x 100
Subtract the new number by the original number
257 - 540 = -283
-283 ÷ 540 = -0.524074074074074
-0.524074074074074 x 100 = -52.41%