-5.37% is the change from 540 to 511
Calculation steps:
[( 511 - 540 ) ÷ 540] x 100 = -5.37%
Formula
Percentage change = [(511 - 540) / 540] x 100
Subtract the new number by the original number
511 - 540 = -29
-29 ÷ 540 = -0.053703703703703705
-0.053703703703703705 x 100 = -5.37%