-45.66% is the change from 990 to 538
Calculation steps:
[( 538 - 990 ) ÷ 990] x 100 = -45.66%
Formula
Percentage change = [(538 - 990) / 990] x 100
Subtract the new number by the original number
538 - 990 = -452
-452 ÷ 990 = -0.45656565656565656
-0.45656565656565656 x 100 = -45.66%