-15.48% is the change from 646 to 546
Calculation steps:
[( 546 - 646 ) ÷ 646] x 100 = -15.48%
Formula
Percentage change = [(546 - 646) / 646] x 100
Subtract the new number by the original number
546 - 646 = -100
-100 ÷ 646 = -0.15479876160990713
-0.15479876160990713 x 100 = -15.48%