-70.61% is the change from 990 to 291
Calculation steps:
[( 291 - 990 ) ÷ 990] x 100 = -70.61%
Formula
Percentage change = [(291 - 990) / 990] x 100
Subtract the new number by the original number
291 - 990 = -699
-699 ÷ 990 = -0.706060606060606
-0.706060606060606 x 100 = -70.61%