-64.41% is the change from 902 to 321
Calculation steps:
[( 321 - 902 ) ÷ 902] x 100 = -64.41%
Formula
Percentage change = [(321 - 902) / 902] x 100
Subtract the new number by the original number
321 - 902 = -581
-581 ÷ 902 = -0.6441241685144125
-0.6441241685144125 x 100 = -64.41%