-6.97% is the change from 545 to 507
Calculation steps:
[( 507 - 545 ) ÷ 545] x 100 = -6.97%
Formula
Percentage change = [(507 - 545) / 545] x 100
Subtract the new number by the original number
507 - 545 = -38
-38 ÷ 545 = -0.06972477064220184
-0.06972477064220184 x 100 = -6.97%