-16.25% is the change from 646 to 541
Calculation steps:
[( 541 - 646 ) ÷ 646] x 100 = -16.25%
Formula
Percentage change = [(541 - 646) / 646] x 100
Subtract the new number by the original number
541 - 646 = -105
-105 ÷ 646 = -0.16253869969040247
-0.16253869969040247 x 100 = -16.25%