-64.55% is the change from 990 to 351
Calculation steps:
[( 351 - 990 ) ÷ 990] x 100 = -64.55%
Formula
Percentage change = [(351 - 990) / 990] x 100
Subtract the new number by the original number
351 - 990 = -639
-639 ÷ 990 = -0.6454545454545455
-0.6454545454545455 x 100 = -64.55%