-34.9% is the change from 831 to 541
Calculation steps:
[( 541 - 831 ) ÷ 831] x 100 = -34.9%
Formula
Percentage change = [(541 - 831) / 831] x 100
Subtract the new number by the original number
541 - 831 = -290
-290 ÷ 831 = -0.3489771359807461
-0.3489771359807461 x 100 = -34.9%