-61.88% is the change from 850 to 324
Calculation steps:
[( 324 - 850 ) ÷ 850] x 100 = -61.88%
Formula
Percentage change = [(324 - 850) / 850] x 100
Subtract the new number by the original number
324 - 850 = -526
-526 ÷ 850 = -0.6188235294117647
-0.6188235294117647 x 100 = -61.88%