-73.13% is the change from 990 to 266
Calculation steps:
[( 266 - 990 ) ÷ 990] x 100 = -73.13%
Formula
Percentage change = [(266 - 990) / 990] x 100
Subtract the new number by the original number
266 - 990 = -724
-724 ÷ 990 = -0.7313131313131314
-0.7313131313131314 x 100 = -73.13%