-6.42% is the change from 545 to 510
Calculation steps:
[( 510 - 545 ) ÷ 545] x 100 = -6.42%
Formula
Percentage change = [(510 - 545) / 545] x 100
Subtract the new number by the original number
510 - 545 = -35
-35 ÷ 545 = -0.06422018348623854
-0.06422018348623854 x 100 = -6.42%