-6.78% is the change from 546 to 509
Calculation steps:
[( 509 - 546 ) ÷ 546] x 100 = -6.78%
Formula
Percentage change = [(509 - 546) / 546] x 100
Subtract the new number by the original number
509 - 546 = -37
-37 ÷ 546 = -0.06776556776556776
-0.06776556776556776 x 100 = -6.78%