-73.94% is the change from 990 to 258
Calculation steps:
[( 258 - 990 ) ÷ 990] x 100 = -73.94%
Formula
Percentage change = [(258 - 990) / 990] x 100
Subtract the new number by the original number
258 - 990 = -732
-732 ÷ 990 = -0.7393939393939394
-0.7393939393939394 x 100 = -73.94%