-63.86% is the change from 830 to 300
Calculation steps:
[( 300 - 830 ) ÷ 830] x 100 = -63.86%
Formula
Percentage change = [(300 - 830) / 830] x 100
Subtract the new number by the original number
300 - 830 = -530
-530 ÷ 830 = -0.6385542168674698
-0.6385542168674698 x 100 = -63.86%