-65.5% is the change from 939 to 324
Calculation steps:
[( 324 - 939 ) ÷ 939] x 100 = -65.5%
Formula
Percentage change = [(324 - 939) / 939] x 100
Subtract the new number by the original number
324 - 939 = -615
-615 ÷ 939 = -0.6549520766773163
-0.6549520766773163 x 100 = -65.5%