-14.58% is the change from 638 to 545
Calculation steps:
[( 545 - 638 ) ÷ 638] x 100 = -14.58%
Formula
Percentage change = [(545 - 638) / 638] x 100
Subtract the new number by the original number
545 - 638 = -93
-93 ÷ 638 = -0.14576802507836992
-0.14576802507836992 x 100 = -14.58%