-63.37% is the change from 830 to 304
Calculation steps:
[( 304 - 830 ) ÷ 830] x 100 = -63.37%
Formula
Percentage change = [(304 - 830) / 830] x 100
Subtract the new number by the original number
304 - 830 = -526
-526 ÷ 830 = -0.6337349397590362
-0.6337349397590362 x 100 = -63.37%