-34.7% is the change from 611 to 399
Calculation steps:
[( 399 - 611 ) ÷ 611] x 100 = -34.7%
Formula
Percentage change = [(399 - 611) / 611] x 100
Subtract the new number by the original number
399 - 611 = -212
-212 ÷ 611 = -0.3469721767594108
-0.3469721767594108 x 100 = -34.7%