-96.12% is the change from 541 to 21
Calculation steps:
[( 21 - 541 ) ÷ 541] x 100 = -96.12%
Formula
Percentage change = [(21 - 541) / 541] x 100
Subtract the new number by the original number
21 - 541 = -520
-520 ÷ 541 = -0.9611829944547134
-0.9611829944547134 x 100 = -96.12%