-3.06% is the change from 555 to 538
Calculation steps:
[( 538 - 555 ) ÷ 555] x 100 = -3.06%
Formula
Percentage change = [(538 - 555) / 555] x 100
Subtract the new number by the original number
538 - 555 = -17
-17 ÷ 555 = -0.03063063063063063
-0.03063063063063063 x 100 = -3.06%