-60.96% is the change from 830 to 324
Calculation steps:
[( 324 - 830 ) ÷ 830] x 100 = -60.96%
Formula
Percentage change = [(324 - 830) / 830] x 100
Subtract the new number by the original number
324 - 830 = -506
-506 ÷ 830 = -0.6096385542168675
-0.6096385542168675 x 100 = -60.96%