-10.09% is the change from 545 to 490
Calculation steps:
[( 490 - 545 ) ÷ 545] x 100 = -10.09%
Formula
Percentage change = [(490 - 545) / 545] x 100
Subtract the new number by the original number
490 - 545 = -55
-55 ÷ 545 = -0.10091743119266056
-0.10091743119266056 x 100 = -10.09%