-45.41% is the change from 991 to 541
Calculation steps:
[( 541 - 991 ) ÷ 991] x 100 = -45.41%
Formula
Percentage change = [(541 - 991) / 991] x 100
Subtract the new number by the original number
541 - 991 = -450
-450 ÷ 991 = -0.45408678102926336
-0.45408678102926336 x 100 = -45.41%