-61.52% is the change from 829 to 319
Calculation steps:
[( 319 - 829 ) ÷ 829] x 100 = -61.52%
Formula
Percentage change = [(319 - 829) / 829] x 100
Subtract the new number by the original number
319 - 829 = -510
-510 ÷ 829 = -0.6151990349819059
-0.6151990349819059 x 100 = -61.52%