-64.73% is the change from 910 to 321
Calculation steps:
[( 321 - 910 ) ÷ 910] x 100 = -64.73%
Formula
Percentage change = [(321 - 910) / 910] x 100
Subtract the new number by the original number
321 - 910 = -589
-589 ÷ 910 = -0.6472527472527473
-0.6472527472527473 x 100 = -64.73%