-64.84% is the change from 913 to 321
Calculation steps:
[( 321 - 913 ) ÷ 913] x 100 = -64.84%
Formula
Percentage change = [(321 - 913) / 913] x 100
Subtract the new number by the original number
321 - 913 = -592
-592 ÷ 913 = -0.6484118291347207
-0.6484118291347207 x 100 = -64.84%