-61.2% is the change from 830 to 322
Calculation steps:
[( 322 - 830 ) ÷ 830] x 100 = -61.2%
Formula
Percentage change = [(322 - 830) / 830] x 100
Subtract the new number by the original number
322 - 830 = -508
-508 ÷ 830 = -0.6120481927710844
-0.6120481927710844 x 100 = -61.2%