-15.33% is the change from 646 to 547
Calculation steps:
[( 547 - 646 ) ÷ 646] x 100 = -15.33%
Formula
Percentage change = [(547 - 646) / 646] x 100
Subtract the new number by the original number
547 - 646 = -99
-99 ÷ 646 = -0.15325077399380804
-0.15325077399380804 x 100 = -15.33%