-50.9% is the change from 611 to 300
Calculation steps:
[( 300 - 611 ) ÷ 611] x 100 = -50.9%
Formula
Percentage change = [(300 - 611) / 611] x 100
Subtract the new number by the original number
300 - 611 = -311
-311 ÷ 611 = -0.5090016366612111
-0.5090016366612111 x 100 = -50.9%