-64.8% is the change from 912 to 321
Calculation steps:
[( 321 - 912 ) ÷ 912] x 100 = -64.8%
Formula
Percentage change = [(321 - 912) / 912] x 100
Subtract the new number by the original number
321 - 912 = -591
-591 ÷ 912 = -0.6480263157894737
-0.6480263157894737 x 100 = -64.8%